Team:Hong Kong-CUHK/Laboratory log book
From 2011.igem.org
- week 0
- week 1
- week 2
- week 3
- week 4
- week 5
- week 6
- week 7
- week 8
- week 9
- week 10
- week 11
2 June2011 (Tue)
1. Frankie- transformed the bacteria with RFP and prepared the T7 and HR gene plasmid for PCR.
Monday 6 June – Sunday 12 June
2 June2011 (Tue)
1. Frankie- transformed the bacteria with RFP and prepared the T7 and HR gene plasmid for PCR.
9 June2011 (Thu)
1. Repeat Wed work
2. IPTG inducer
3. PCR amplification - T7 and HR(rhodopsin)
4. Gel clean to get T7 and HR gene from gel
10 June2011 (Fri)
1. Restriction cut of T7, HR and iGEM vector, ligate them together
2. Received all medium to grow magnetobacteria
13 June 2011 (Mon)
1. Nanodrop test DNA concentration
2. Transformation to competent cells, spread on plate A & plate K
14 June 2011 (Tue)
1. no colonies were found on spread plate. possible reasons:
antibiotic C resistance spread on plate K
failed restriction cut,
spreading tools too hot which kill the bacteria…
2. Attempt to mix culturing medium for halobacterium salinarum DSM 3754, haloterrigena turkmenica DSM 5511, Natronomonas pharaohs DSM 2160, but couldn't find casamino acids which are essential for all the medium required
3. Repeat work of last week: restriction cut, ligation
15 June 2011 (Wed)
1. transformation of E.coli competent cells.
Monday 20 June – Sunday 26 June
20 June (Mon)
1. Restriction cut
pSB1A3 & pSB1K3
HR & T7 promoter
restriction enzyme: EcoR1 &Pst1
incubate at 37oC , 2hours
2. PCR purification of cut product
refer to kit protocol
3. Agarose gel electrophoresis (Run gel) of purified product
at 120V, 45minutes
Failed. Possible reasons: insufficient DNA conc. In gel, stock problem
4. Ligation
HR+pSB1A3
T7+ pSB1A3
HR+ pSB1K3
T7+ pSB1K3
at 16 oC, overnight
5. Inoculation transformation buffer preparation
Steps of preparing 500ml inoculation transformation buffer
1. 55mM MaCl2‧4H2O (5.4425g)
2. 15mM CaCl2‧2H2O (1.1025g)
3. 250mM KCl (9.3189g)
4. 10mM PIPES (10ml) (taken from 4oC fridge)
5. Stored in 4oC fridge
109 plate with antibiotic A and K is poured
6. Detection of T7 and HR by gel electrophoresis
no band of sample is shown
21 June (Tue) No record
22 June (Wed)
1. Pick colonies
Each plate pick 2 colonies into 2 tubes
2. Inoculation
at 37 oC, 250rpm, 7hours
3. Transfer
DH5α(B tube) : 1ml & 0.5 ml
BL 21 (B tube) : 1ml & 0.5 ml
Rosetta (A tube): 2ml
Overnight, 200rpm
4. Prepare 500ml LB, 500ml LB with 1M NaCl and 500ml LB with 1M KCl solution LB solution
5. transform pET27bHR with K resistance into DH5α, BL21
23 June (Thu)
1. Measure OD of transfer
All tubes’ OD > 0.55
Due to contamination in the step of picking colonies. We shouldn’t put the pipette tips into the tubes since our medium does not contain antibodies
2. Repeated the experiment from picking colonies and inoculation
Only DH5α is used
7 hours inoculation
Inoculation failed.
3. Restarted from culturing E.coli on agar plate
DH5α & BL21
4. Restriction cut and Double Digestion
HR 20ng/ul
T7 20ng/ul
Since there are not enough solution(a 50ul system should have at least 200ng of DNA) to make up a 50ul system, we modify the system to 25ul.
Solution (added by order) Amount(ul)
ddH20 14
10X Buffer 3 2.5
10X BSA 2.5
EcoR1 0.5
Pst1 0.5
HR 5
Total 25ul
Solution (added by order) Amount(ul)
ddH20 14
10X Buffer 3 2.5
10X BSA 2.5
EcoR1 0.5
Pst1 0.5
T7 5
Total 25ul
Solution (added by order) Amount(ul)
ddH20 15
10X Buffer 3 2.5
10X BSA 2.5
EcoR1 0.5
Pst1 0.5
pSB1 4
Total 25ul
The 3tubes are put at 37 oC for 2hours
5. Restriction cut
T7/HR restriction cut mixture
pSB1 T3 restriction cut mixture
The mixture is put into thermomixer at 37oc for 2hs
Inoculated 5ml start culture of DH5α,, no BL21 colony is observed on the plate
6 sets of solution is prepared
0 – 1M NaCl with IPTG
0 – 1M NaCl without IPTG
0 – 1M KCl with IPTG
0 – 1M KCl without IPTG
0M salt with IPTG
0M salt without IPTG
(the solution without salt is set as controls)
[Salt]/M 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LB + salt/ml 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4
LB/ml 4.0 3.6 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4 0
For each tube, 2ul IPTG is added (for sample with IPTG), 40ul DH5α start culture, 4ml LB+ salt volumes
5ml start culture of DH5αis inoculated again for the miniprep on next day
OD of solution is checked on next day
24 June (Fri)
1. Picking E.coli colonies cultured yesterday
DH5α & BL21
2. Inoculation:
4 DH5α tubes & 4 BL21 tubes
Each with 5ml LB
37℃, 250rpm
3. Transfer inoculation mixture into 125ml LB in conical flask
1.0ml DH5α-2, 0.5ml DH5α-2
1.0ml BL21-2, 0.5ml BL21-2
Shake at 37℃, 250rpm, overnight
4. Transform “HR+1T3” & “T7+1T3” into DH5α competent cells
1.0ml HR+1T3, 0.5ml HR+1T3
1.0ml T7+1T3, 0.5ml T7+1T3
1 control plate without antibiotics tetracycline
Incubate at 37℃, overnight
5. Light absorbance of DH5α KCl IPTG
DH5α KCl, DH5α NaCl IPTG and DH5α NaCl is measured
Light absorbance of DH5α KCl IPTG
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1(5x) 0.532 2.660
0.2(5x) 0.515 2.575
0.3(5x) 0.477 2.385
0.4(5x) 0.390 1.950
0.5(5x) 0.370 1.850
0.6(5x) 0.267 1.335
0.7(5x) 0.92 0.960
0.8(2x) 0.300 0.600
0.9(2x) 0.156 0.312
1.0 0.249 0.249
0 0.791 0.791
Light absorbance of DH5α KCl
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1(5x) 0.500 2.500
0.2(5x) 0.447 2.235
0.3(5x) 0.430 2.150
0.4(5x) 0.399 1.995
0.5(5x) 0.305 1.525
0.6(5x) 0.264 1.32
0.7(5x) 0.205 1.025
0.8(5x) 0.117 0.585
0.9(2x) 0.220 0.440
1.0 0.263 0.263
0(5x) 0.519 2.595
Light absorbance of DH5α NaCl IPTG
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1(2x) 0.829 1.658
0.2(2x) 0.844 1.688
0.3(5x) 0.898 1.796
0.4(5x) 0.384 1.920
0.5(5x) 0.340 1.700
0.6(5x) 0.208 1.040
0.7(2x) 0.393 0.786
0.8(5x) 0.287 0.574
0.9(2x) 0.119 0.238
1.0 0.113 0.113
Light absorbance of DH5α NaCl
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1(5x) 0.499 2.495
0.2(2x) 0.478 2.390
0.3(5x) 0.513 2.565
0.4(5x) 0.390 1.950
0.5(5x) 0.302 1.510
0.6(5x) 0.246 1.230
0.7(5x) 0.194 0.970
0.8(2x) 0.269 0.538
0.9 0.284 0.284
1.0 0.103 0.103
6. Miniprep
7. Storage of cells
Transfer 1ml from each cell culture to 1.5ml microcentrifuge tube
Spin for 1min
Remove medium by discarding and pipetting
Store the cells at -80oc
25 June (Sat)
1. OD measurement (OD 600nm) of transferred product
BL21 0.5ml 1.891
BL21 1.0ml 1.831
DH5α 0.5ml 0.670
DH5α 1.0ml 1.415
All tubes’ OD > 0.55
Might have contamination
Still used DH5α 0.5ml 0.670 OD600 to make competent cells
Made 25 tubes of competent cells at -80℃
2. pick colonies, Inoculation,
2 from HR+1T3, 2 from T7+1T3 II, 1 from HR+1T3 I into 5ml LB+tetracycline snap-cap tube
3. Transfer 125ml magnetotactic bacteria medium to a conical flask, waiting for autoclave
Monday 27 June – Sunday 3 July
27 June (Mon)
1. Inoculated 5ml start culture of DH5α transformed with HR pET37b using the plate the week before
2. Prepared 6 conical flasks
LB with 50ul IPTG + 100ul antibiotic K
LB without IPTG + 100ul antibiotic K
0.6M NaCl LB with 50ul IPTG + 100ul antibiotic K
0.6M NaCl LB without IPTG + 100ul antibiotic K
0.6M KCl LB with 50ul IPTG + 100ul antibiotic K
0.6M KCl LB without IPTG + 100ul antibiotic K
For measuring OD absorbance and plot growth curve of DH5α on 28/06/2011 every 30/45min
3. Prepared 4 sets of solution same as 23/06/2011 to verify the optimum concentration of salt for DH5α to grow and absorb salt and added DH5α start culture
4. Inoculate 5ml start culture of DH5α transformed with HR pET27b using the plate of the week before for the 6 conical flasks for 8/06/2011 growth curve (+5ul antibiotic K)
28 June (Tue)
1. Prepare another set of competent cell
Pick single colony from plates prepared on Sat
Transfer the colony into 5ml of LB broth in FALCON
Incubate for 6hrs @37℃, shaking (250-300rpm)
~6pm, use the incubated starter culture to prepare 2 1L flasks
FLASK1: 0.5ml culture + 125LB FLASK2: 0.25 ml culture + 125LB
Incubate at 22℃, moderate shaking, overnight
2. Transform competent cells prepared on Sat 25 June
Incubate at 37℃, overnight
3. Plasmid DNA purification
T7, PSB1K3 / HR, PSB1K3
USING Spin MiniPrep Kit and a Microcentrifuge
4. Light absorbance of DH5α KCl IPTG, DH5α KCl, DH5α NaCl IPTG, DH5α NaCl, DH5α 0M LB and DH5α 0M LB IPTG
Light absorbance of DH5α KCl IPTG
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1(2x) 0.916 1.832
0.2(2x) 0.756 1.512
0.3(2x) 0.527 1.054
0.4 0.426 0.426
0.5 0.710 0.710
0.6 0.310 0.310
0.7 0.156 0.156
0.8 0.129 0.129
0.9 0.072 0.072
1.0 0.012 0.012
Light absorbance of DH5α KCl
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1 0.618 2.472
0.2 0.427 1.708
0.3 0.274 1.096
0.4 0.845 1.690
0.5 0.474 0.948
0.6 0.970 0.970
0.7 0.626 1.252
0.8 0.504 0.504
0.9 0.083 0.083
1.0 -0.011 -0.011
Light absorbance of DH5α NaCl IPTG
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1(2x) 0.794 1.588
0.2(2x) 0.716 1.432
0.3(2x) 0.483 0.966
0.4(2x) 0.436 0.872
0.5 0.761 0.761
0.6 0.713 0.713
0.7 0.641 0.641
0.8 0.491 0.491
0.9 0.168 0.168
1.0 0.044 0.044
Light absorbance of DH5α NaCl
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1(2x) 0.932 1.864
0.2(2x) 0.719 1.438
0.3(2x) 0.535 1.070
0.4(2x) 0.525 1.050
0.5 0.882 0.882
0.6 0.819 0.819
0.7 0.712 0.712
0.8 0.470 0.470
0.9 0.123 0.123
1.0 0.031 0.031
Light absorbance of DH5α 0M LB
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1 0.763 1.526
0.2 0.829 1.658
0.8ml DH5α is added to start culture solution of the 6 conical flask prepared the day before, the absorbance of solution is measured per 30mins
Time(h)\OD of Solution LB LB IPTG 0.6M NaCl LB 0.6M NaCl LB IPTG 0.6M KCl LB 0.6M KCl LB IPTG
0 0.015 0.016 0.028 0.030 0.025 0.047
0.5 0.025 0.024 0.050 0.017 0.041 0.014
1 0.035 0.039 0.077 0.015 0.025 0.029
1.5 0.071 0.080 0.070 0.005 0.036 0.026
2 0.146 0.176 0.111 0.005 0.044 0.044
2.5 0.307 0.338 0.148 0.003 0.063 0.057
3 0.473 0.527 0.262 0.017 0.093 0.093
3.5 0.650 0.669 0.345 0.012 0.134 0.137
4 0.874 0.888 0.473 0.003 0.219 0.210
4.5 10.66 1.128 0.626 0.001 0.323 0.310
5 0.753(2x) 0.800(2x) 0.722 0.001 0.386 0.365
5ml start culture of DH5α is transformed with HR pET27b (using the plate the week before) is inoculated, 6 conical flasks of solution is prepared same as the 12/06/2011
29 June (Wed)
1. Measure OD of competent cell prepared yesterday
Flask 1 2 3 4
OD 600 1.697 1.844 1.840 1.662
All flasks have OD greater than 0.55, it indicates contamination.
Failed
2. Measure DNA concentration
Use DNA purified yesterday
260/280 DNA concentration (ng/ul)
T7 pSB1K3 (1) 1.95 32.6
T7 pSB1K3 (2) 1.90 32.2
HR pSB1K3 (1) 2.08 12.2
HR pSB1K3 (2) 2.01 12.3
3. Prepare new competent cells
Transfer 0.1 nd 0.5ml DH5a and BL21 into 125ml LB
4. Double restriction cut of T7 pSB1K3 and HR pSB1K3
Water 11.75ul
Buffer 3 3.5ul
BSA 0.35ul
EcoR1 0.7ul
Pst1 0.7ul
T7 pSB1K3 8ul
Total 25ul
Buffer 3 2.5ul
BSA 0.25ul
EcoR1 0.5ul
Pst1 0.5ul
HR pSB1K3 21.25ul
Total 25ul
Incubate at 37oC for 2hrs
5. Run gel
T7: band at ~150kb
HR: band at ~800kb
6. The absorbance of 6 solutions
Time(h)\OD of Solution LB LB IPTG 0.6M NaCl LB 0.6M NaCl LB IPTG 0.6M KCl LB 0.6M KCl LB IPTG
0 0.002 0.023 0.019 0.026 0.001 0.001
0.5 0.006 0.004 0.020 0.032 0.003 0.018
1 0.012 0.022 0.043 0.031 0.011 0.006
1.5 0.023 0.028 0.047 0.021 0.017 0.032
2 0.110 0.151 0.065 0.068 0.025 0.021
2.5 0.279 0.345 0.129 0.075 0.029 0.053
3 0.430 0.455 0.488 0.137 0.068 0.057
3.5 0.591. 0.640 0.230 0.183 0.089 0.112
4 0.748 0.830 0.310 0.264 0.122 0.150
4.5 0.962 1.053 0.445 0.353 0.183 0.265
5 0.747 0.832 0.389 0.310 0.177 0.209
5.5 0.939 10.17 0.448 0.380 0.235 0.261
6 0.764 0.745 0.360 0.316 0.251 0.310
30 June (Thur)
1. Measure OD of 0.1 and 0.05ml of DH5a and BL21 in 125 LB prepared on 29 June
Volume (ul) OD 600
DH5a 50 0.352
100 0.523
BL 21 50 0.349
100 1.710
DH5a 100ul is taken for making competent cells
Use competent cells made to transform T7 and HR
Streak plates to check if competent cells viable
Total of 8 plates
Incubate at 37oC overnight
2. Spread plates with transformed competent cells
T7 pSB1K3 in DH5a
HR pSB1K3 in DH5a
Total of 4 plates
3. PCR purification of iGEM plasmid
4. PCR purification of plasmid made
1K3, 1T3, 1C3
5. Run gel
No result
1 July (Fri)
1. Check plates
All 8 plates shown bacteria growth
All 4 plates shown transformed cells growth
2. Pick colonies
DH5a and competent cells with T71K3 and HR1K3
Total of 12 snap caps
Shake at 250rpm, 37oC overnight
3. PCR amplification and purification of iGEM psB1K3
4. Run gel
No banding
2 July (Sat)
1. Mini prep
DH5a HR x3
DH5a T7 x3
HR1K3 x3
T71K3 x2
One of the T71K3 didn’t form pallet after centrifugation
2. Digestion
Water 11.2ul
DNA 10ul
Buffer 3 2.5ul
EcoR1 0.5ul
Pst1 0.5ul
BSA 0.25ul
Total 25ul
Incubate at 37oC, 2hrs
Remaining samples are stored at -20oC
3. Run gel (with 2 setups)
Well 1 2 3 4 5 6
ladder T71K3 (1) T71K3 (2) HR(1) HR(2) HR(3)
Result: Lane 1 and 3 have bands of ~100-200bp
Land 4 to 6 has bands of 800bp
Well 1 2 3 4 5 6 7
ladder T7(1) T7(2) T7(3) HR1K3(1) HR1K3(2) HR1K3(3)
Result: Lane 2 to 4 has bands of ~100-200bp
Lane 5 to 7 has bands of ~800bp
3 July (Sun): No record
Monday 4 July – Sunday 10 July
4 July (Mon)
1. Pick colonies
BL21, 3 snap caps
Incubate at 37oC, 250rpm
4. Prepare plates with antibiotics
25 plates with C
43 plates with K
5. Transfer incubated BL21 to 125ml LB, total of 3 samples, each with 50ul BL21 added
Incubate at37oC overnight, 150rpm
6. 5ml start culture of DH5α is inoculated and put into the incubator in common room
7. 6 conical flasks is prepared
LB IPTG
0.6M NaCl LB IPTG
0.6M KCl LB IPTG
0.1M – 1M NaCl IPTG
0.1M – 1M KCl IPTG
LB without IPTG
5 July (Tue)
1. Prepare competent cells
OD
BL21 (1) 1.958
BL21 (2) 1.918
BL21 (3) 1.907
OD greater than 0.55, repeat the experiment
Using BL21, we incubate cells from picking colony from plates
Culture from tubes are transferred to the flask containing LB at 25oC overnight, 130 rpm
2. PCR purification of T71K3 plasmid
Using iGEM protocol
Concentration of primers is 100pmol/ul, hence we have to dilute it to 30pmol/ul
3. Run gel using iGEM protocol and product protocol
After PCR amplification
Result: both show bandings beyond 100bp
iGEM protocol shows banding at 2000kb
After PCR purification
Result: iGEM protocol shows banding at 2000kb
4. Inoculation
5. 1ml DH5α start culture solution is added to3 conical flasks prepared on 4/7.
The absorbance and cell density is measured every 30 minutes.
Cell density at 2h and 2.5 h is failed to be measured.
Procedure of measuring cell density
i. 1ml solution is transferred to microcentrifuge tube, centrifuge for 1min and resuspend
ii. 10ul solution is transfer to both side of the hematocytometer and cover with the cover slit
iii. observe the central square with 10x magnification under microscope and count the number of cell
Dilution is required (10fold, 100fold, 1000fold .. ) for higher absorbance
(1OD unit = 109 cell)
Absorbance of 21 tubes is measured.
Light absorbance of DH5α NaCl IPTG( 4times diluted)
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1 0.701 2.804
0.2 0.786 3.144
0.3 0.680 2.720
0.4(2x) 0.947 3.788
0.5(2x) 0.603 2.412
0.6(2x) 0.538 2.152
0.7 0.334 1.336
0.8 0.083 0.332
0.9 0.025 0.100
1.0 0.022 0.088
Light absorbance of DH5α KCl IPTG( 4times diluted)
Concentration/M OD (ABS/cm) Final OD (ABS/cm) (without dilution)
0.1 0.893 3.572
0.2 0.906 3.624
0.3 0.780 3.120
0.4 0.445 1.780
0.5 0.621 2.484
0.6 0.083 0.332
0.7 0.218 0.872
0.8 0.040 0.160
0.9 0.010 0.040
1.0 0.027 0.108
Light absorbance of 3 solutions
Time(h)\OD of Solution LB IPTG 0.6M NaCl LB 0.6M KCl LB
0 0.025 0.070 0.054
0.5 0.043 0.065 0.044
1 0.117 0.068 0.067
1.5 0.185 0.041 0.059
2 0.389 0.069 0.064
2.5 0.634 0.085 0.081
3 1.039 0.107 0.111
3.5 1.586 0.188 0.181
4 0.334 0.274 0.268
4.5 0.364 0.350 0.328
5 2.412 0.432 0.450
Cell density (HR, IPTG, LBK, DH5α, pET27b HR)
Time(h) Averaged cell density
0 1.5 x 104
0.5 2.0 x 104
1 1.3 x 105
1.5 2.0 x 106
2 -
2.5 -
3 8.95 x 106
3.5 8.30 x 109
4 1.145 x 1010
4.5 6.70 x 109
5 6.10 x 109
6 July (Wed)
1. Prepare BL21 competent cell
BL21 OD
1 1.094
2 1.263
3 1.263
4 1.163
OD>0.55, preparation failed
2. Restriction cut of T71K3 prepared on 5July
Buffer 3 5ul
BSA 0.5ul
Eco R1 1ul
Pst 1 1ul
T71K3 10ul
3. Run gel to check the size of 2 sets of T71K3
Both samples show banding of ~4000kb
4. Streak plate: BL21 X7
5. 5ml start culture of DH5α is inoculated and put into the incubator in common room
6. 3 conical flasks is prepared
LB IPTG
0.4M NaCl LB IPTG
0.4M Kcl LB IPTG
7 July (Thu)
1. Pick colony of BL21 X4 and inoculation
37 oC, 250rpm
2. PCR amplification
“Home-made” HR1K3, “Home-made” T71K3, stock 1K3
Using iGEM protocol
PCR supermix 45ul
Upper primer 1ul
Lower primer 1ul
Water 25ul
DNA 0.5ul
TOTAL 50ul
3. Transfer 50ul BL21 to 125ul LB
Inoculated at 37 oC, 250rpm
4. Run gel
Lane1: ladder
Lane3: “Home-made” HR1K3
Lane4: “Home-made” T71K3
Lane5: stock 1K3
5. OD of BL21 in 125ml LB
1 2 3 4
16:30 0.006 0.007 0.007 0.020
16:45 0.007 0.013 0.01 0.007
20:45 0.143 0.085 0.085 0.136
22:15 0.367 0.312
6. 5ml DH5α start culture solution is added to3 conical flasks prepared on 5/7
The absorbance and cell density is measured every 30 minutes
7. 3 conical flasks is prepared
100ml LB + 50ul IPTG + 100ul antibiotic K
60ml LB + 40ml KCl LB + 50ul IPTG + 100ul antibiotic K
60ml LB + 40ml NaCl LB + 50ul IPTG + 100ul antibiotic K
Time(h)\OD600 of Solution LB IPTG 0.4M NaCl LB 0.4M KCl LB
0 0.033 0.031 0.025
0.5 0.037 0.032 0.017
1 0.078 0.013 0.033
1.5 0.122 0.056 0.047
2 0.310 0.102 0.096
2.5 0.423 0.157 0.156
3 0.620 0.255 0.256
3.5 0.893 0.398 0.427
4 1.186 0.590 0.621
4.5 1.632 0.859 0.803
Cell density of DH5α, pET27b HR, LB IPTG with K
Time(h) Averaged cell density
0 3x106
0.5 2.5 x106
1 3.75 x107
1.5 1 x107
2 9.75 x108
2.5 9.15 x108
3 2.43 x109
3.5 2.555 x109
4 2.7875 x109
4.5 2.225 x109
8July (Fri)
1. Streak plate of Bl21 competent cell
incubate at 37 oC
2. transformation of Pwt: BBa_E0044 (Green Fluorescent Protein deviated from jellyfish Aequeora Victoria wild-type GFP with plasmid pSB1A3, in 2011 kit plate 1 well 14G)
10ul H20 added to well 14G
DNA concentration was measured: 85.1ug/ul
1ul of DHA was added to DH5a competent cell
2 tubes of competent cell was used, one being taken from other bb (labeled as DH5a T) and one being prepared by overselves (labeled as DH5a)
Monday 11 July – Sunday 17 July
11 July (Mon)
1. iGEM plasmid stock check:
pSB1K3 ~ 0ul
pSB1C3 < 1ul
pSB1T3 ~4-5ul
pSB1A3 ~4-5ul
Insufficient quantity
Bacterial amplification (plasmid+biobrick) of pSB1A3 (taken from iGEM kit plate 1, 1G)
Use competent cell prepared on 30June
Transformation: put pSB1A3 + biobrick into DH5a
Result refered to 13July
12 July(Tue)
1. Nano drop
T7 + 1K3 42.5 ng/ul
HR + 1K3 13.5 ng/ul
pSB1T3 labeled to be 25ng/ul
2. Double digestion
Incubated at 37 oC, 2hours
H2O 19.25ul
Buffer 2 2ul
BSA 2.5ul
Eco R1 0.5ul
Spe 1 0.5ul
T71K3 0.25ul
TOTAL 25ul
H2O 14.25ul
Buffer 2 2.5ul
BSA 0.25ul
Xbal 1 0.5ul
Pst 1 0.5ul
HR1K3 7ul
TOTAL 25ul
H2O 17.25ul
Buffer 2 2.5ul
BSA 0.25ul
Eco R1 0.5ul
Pst 1 0.5ul
pSB1T3 4ul
TOTAL 25ul
Result: yield of product is too low
3. Prepare T plate
4. Bacterial amplification of backbone + biobrick (Continue experiment on 11July)
red colonies observed, planned to do Midi Prep on 13July
5. 1ml DH5α start culture solution is pipetted to each conical flasks
The LB IPTG solution is contaminated, OD and cell count is too high and out of the normal range.
Frankie advised to use 500ml next time
Brian will check if the cell count machine works
Preparation of NaCl, KCl DH5α should include using pipette to draw all medium away to avoid bacteria killed by ice.
Time(h)\OD600 of Solution LB IPTG 0.4M NaCl LB 0.4M KCl LB
0 0.180 0.049 0.025
0.5 0.234 0.021 0.020
1 0.301 0.041 0.024
1.5 0.377 0.047 0.055
2 0.606 0.127 0.114
2.5 0.744 0.209 0.212
3 0.916 0.324 0.331
3.5 1.125 0.472 0.449
4 1.289 0.673 0.725
4.5 1.432 0.881 0.886
5 1.533 10147 1.122
5.5 1.654 1.345 1.364
Cell density of DH5α, pET27b HR, LB IPTG with K
Time(h) Averaged cell density
0 2.21x107
0.5 8.3 x108
1 7.9 x107
1.5 3.6 x108
2 3.035 x109
13July (Wed)
1. Double digestion (repeat experiment of yesterday)
Modify the volume to minimize the amount of insert(T7, HR)
Buffer 2 2ul
BSA 0.2ul
Eco R1 0.5ul
Spe 1 0.5ul
T71K3 16.8ul
TOTAL 20ul
Buffer 2 2ul
BSA 0.2ul
Xbal 1 0.5ul
Pst 1 0.5ul
HR1K3 16.8ul
TOTAL 20ul
H2O 12.8ul
Buffer 2 2ul
BSA 0.2ul
Eco R1 0.5ul
Pst 1 0.5ul
pSB1T3 4ul
TOTAL 20ul
2. Run gel to check cut products
1 2 3 4 5 6 7 8
blank HR+1K3 Ladder T7+1K3 blank pSB1T3 blank blank
3. Transformation of HR+1K3, T7+1K3 prepared on 28June
plates spread with antibiotics K, incubate overnight
plates labeled as “HR+1K3 prepared on 28June” and “T71K3 prepared on 28June”
4. Red colonies observed on plates prepared on 11July
Miniprep tomorrow
5. Gel check after double digestion and gel extraction
Lane3: ladder
Lane6: T7 (13.1 ng/ul) ~200kb
Lane9: HR (25.5 ng/ul) ~800kb
Lane12: 1T3 (2.3ng/ul)
Gel result: weak banding
6. Ligation
T4 ligase buffer 2ul
T4 ligase 1ul
T7 8ul
HR 6ul
Vector (pSB1T3) 3ul
TOTAL 20ul
14July (Thu): no record
15July (Fri)
1. Transformation
DH5a competent cell prepared on 30June
3 way ligation (T7- HR- 1T3)
2. Inoculation
Red colonies on plates prepared on 17July
2 centrifuge tubes prepared, labeled as red colony1 & 2
Transferred 250ul to 125mL LB (1:500 ratio)
Shake at 37 oC, 250rpm, overnight
Labeled as red col 1&2
16July (Sat)
1. Mini prep
DNA from red colony culture
4 tubes of DNA obtained
2. Digestion
DNA 10ul
10X Buffer 3 2.5ul
10X BSA 2.5ul
EcoR1 0.6ul
Pst1 0.6ul
H2O 8.8
Total 25ul
Incubate at 37oC for 2hrs
3. Pick colonies of 3-way assemblyDH5a
Incubate at 37oC, 250rpm
17 July (Sun)
1. Run gel and gel recovery of red colony
2. Mini prep, run gel and gel recovery of 3-way assembly
3. Run gel using digestion product prepared on 16/7 (red colony)
4. Mini prep DNA of bacteria culture (3-way DH5a)
Total of 5 samples of 3-way 1T3 are made, each with 40ul
Stored at -20oC
10ul of each is used for digestion and run gel to check size
Water 11.25ul
DNA 10ul
Buffer 3 2.5ul
EcoR1 0.5ul
Pst1 0.5ul
BSA 0.25ul
Total 25ul
Incubate at 37oC for 2hrs
5. Gel extraction of gel with 1T3 backbone from red conlony
4 tubes of backbone are made
Store at -20oC
6. Pick red colony of DH5a
4tubes of LB snap cap
Incubate at 37oC, 25rpm
7. Transfer to 125ml LB
Shake at 37oC overnight, 250rpm
8. Streak plate using red colony
Plates with antibiotics A are used
Store in incubator
Monday 18 July – Sunday 24 July
18 July (Mon)
1. Nanodrop
3-way 260/280 ng/ul
1T3 (1) 1.88 56.3
1T3 (2) 1.91 71.5
1T3 (3) 1.91 33.5
1T3 (4) 1.96 20.8
1T3 (5) 1.87 30.1
1T3 backbone (1) 3.78 3.9
1T3 backbone (2) 1.91 5.8
1T3 backbone (3) 1.77 2.0
1T3 backbone (4) 1.42 1.9
2. Mini prep of DH5a with kit plate 1G (red colony)
5 tubes are prepared labeled as 1G (1) to (5)
Store at -20oC
Nanodrop
ng/ul
1G (1) 6.37
1G (2) 0.04
1G (3) 0.22
1G (4) 4.48
1G (5) 0.04
3. Run gel (3-way 1T3)
Show banding at ~4000-5000
4. Gel recovery of 3-way 1T3
5. Double digestion of 3-way 1T3
6. Run gel
No banding shown
7. Restriction cut of 1G (red colony)
8. Run gel 1G (red colony)
Band at ~1000 and ~3000-4000
9. Transformation
Plasmid: T71K3 and HR1T3
DH5a competent cells prepared on 30/6
10. Spread plates
11. Prepared 5 conical flasks with the following components
LB with 50μl IPTG + 100 μl Antibiotic K
LB of 0.4 M NaCl with 50 μl IPTG + 100 μl Antibiotic K
LB of 0.6 M NaCl with 50 μl IPTG + 100 μl Antibiotic K
LB of 0.4 M KCl with 50 μl IPTG + 100 μl Antibiotic K
LB of 0.6 M KCl with 50 μl IPTG + 100 μl Antibiotic K
12. Transformed 5 ml DH5α with pET27b start culture and put them into the incubator at 37°C in the common room.
19 July (Tue)
1. Pick colonies that we spread yesterday
T71K3 (with antibiotics K added) x2
HR1T3 x2
2. Inoculation at 37oC, 250rpm for 6hrs
Failed
3. Add 500 μl DH5α start culture into 5 respective conical flasks prepared on 18/7
record the OD600 of 5 conical flasks and the results are recorded.
Time (h) LB+IPTG 0.4M NaCl +LB +IPTG 0.6M NaCl +LB +IPTG 0.4M KCl+ LB+ IPTG 0.6M KCl + LB +IPTG
0 0.008 0.013 0.013 0.011 0.004
0.5 0.023 0.021 0.021 0.027 0.017
1.0 0.025 0.013 0.015 0.009 0.005
1.5 0.049 0.026 0.010 0.012 0.005
2.0 0.083 0.017 0.011 0.013 0.003
2.5 0.209 0.033 0.015 0.045 0.010
3.0 0.382 0.107 0.058 0.107 0.054
3.5 0.567 0.234 0.082 0.177 0.062
4.0 0.783 0.329 0.126 0.288 0.128
4.5 0.973 0.485 0.165 0.432 0.206
5.0 1.214 0.673 0.258 0.662 0.252
5.5 1.454 0.906 0.386 0.845 0.336
6.0 1.554 1.132 0.450 1.078 0.457
4. Transformed 3 start cultures of DH5α with pET27b with the total volume of 5ml with the following components
5ml LB + 5 μl K
3ml LB + 2ml of 1M NaCl + 5 μl K (LB with 0.4M of NaCl)
2ml LB + 3ml of 1M NaCl + 5 μl K (LB with 0.6M of NaCl)
20 July (Wed)
1. Pick colony
HR1T3 X1
T71K3 X1
Red colony X3
All with antibiotics added
2. Incubation
37 oC, 250rpm, 6hours
3. Transfer
37 oC, 240rpm, overnight
4. Prepared the autoclaved the 4 solutions
500 ml LB X2
500 ml LB constituting 1M NaCl X1
500 ml LB constituting 1M KCl X1
5. Prepared 5 conical with the following constitute
LB with 50μl IPTG
LB of 0.4 M NaCl with 50 μl IPTG
LB of 0.6 M NaCl with 50 μl IPTG
LB of 0.4 M KCl with 50 μl IPTG
LB of 0.6 M KCl with 50 μl IPTG
6. Transformed 5 DH5α with pET27b start solution with different NaCl and KCl concentrations
5ml LB + 5 μl antibiotic K
5ml of 0.4M NaCl + 5 μl antibiotic K
5ml of 0.6M NaCl + 5 μl antibiotic K
5ml of 0.4M KCl + 5 μl antibiotic K
5ml of 0.6M KCl + 5 μl antibiotic K
21July (Thu)
1. Midi Prep of red colony (1G) & HR
3 samples of 1G: 35.7ng/ul, 27ng/ul, 124ng/ul
1 sample of HR: 5.0ng/ul
2. Digestion of 1G red colony using 1G(1) & 1G(3)
1G(1)
Buffer 3 2.5ul
100X BSA 0.25ul
Eco R1 0.5ul
Pst 1 0.5ul
DNA 14ul (500ng)
H20 7.25ul
1G(3)
Buffer 3 2.5ul
100X BSA 0.25ul
Eco R1 0.5ul
Pst 1 0.5ul
DNA 4ul (500ng)
H20 17.25ul
Incubated at 37oC, 2hours
3. Run gel using digestion products
Band size: ~1000 and 2000-2500kb
4. Could not measure the absorbance of LB of 0.6M NaCl, 0.4M KCl and 0.6M KCl because the start culture of DH5α cannot grow properly. The absorbance of start culture of LB and LB of 0.4M NaCl prepared on 20/7/2011 without adding DH5α were measured. Other than that, we also measured the absorbance of LB+ IPTG and LB of 0.4M NaCl+ LB + IPTG
Result
LB + IPTG LB of 0.4M of NaCl
Start culture absorbance (1ml) 1.323 0.464
5.
Time (h) LB+ IPTG LB of 0.4M NaCl + IPTG
0 0.021 0.014
0.5 0.026 0.024
1.0 0.045 0.033
1.5 0.043 0.036
2.0 0.133 0.064
2.5 0.245 0.105
3.0 0.359 0.159
3.5 0.555 0.228
4.0 0.720 0.303
4.5 0.927 0.466
5.0 0628 (2X) 0.618
5.5 0.846(2X) 0.815
6.0 0.899(2X) 0.610(2X)
22July (Fri)
1. Run gel (HR)
2. Transformation
3A pSB1C3
5A pSB1K3
7A pSB1T3
T7 1K3
DH5a competent cells
3. Spread plate
3C plates of 3A-pSB1C3
4K plates of 5A-pSB1K3
4T plates of 7A-pSB1T3
3K plates of T7-1K3
23July (Sat)
1. Digestion using 1G(3) prepared on 21July2011
incubated at 37 oC, 2hours
product stored in 4 oC fridge with label 1G backbone 23h
2. Pick colony & Inoculation
using plates prepared on 22July
- 3A pSB1C3
- 5A pSB1K3
- 7A pSB1T3
- T7-1K3
3 snap caps containing 5ml LB and corresponding antibiotics are prepared for each type of plate.
- 3A pSB1C3 23/7 莊
- 5A pSB1K3 23/7 莊
- 7A pSB1T3 23/7 莊
- T7-1K3 23/7 莊
- Snap caps are put in common shaker
24July (Sun)
1. Mini prep using cultures prepared yesterday, 24 samples are made:
Stored in -20 oC fridge
- 3A1C3 (1-8)
- 7A1T3 (1-4)
- 5A1K3 (1-4)
- T71K3 (1-8)
Monday 25 July – Sunday 31 July
25 July (Mon)
1. Restriction cut
1G (1A3)
2. Run gel to extract backbone 1A3
2 bands observed: ~1000 and ~2000-3000
3. Gel recovery
4. Nanodrop of 24 samples made on 24/7
ng/ul ng/ul ng/ul
3A1C3 (1) 58.7 5A1K3 (1) 48.0 T71K3 (1) 47.6
3A1C3 (2) 42.8 5A1K3 (2) 24.2 T71K3 (2) 46.8
3A1C3 (3) 51.8 5A1K3 (3) 12.1 T71K3 (3) 47.6
3A1C3 (4) 58.1 5A1K3 (4) 12.0 T71K3 (4) 33.9
3A1C3 (5) 29.0 7A1T3 (1) 35.2 T71K3 (5) 47.1
3A1C3 (6) 28.6 7A1T3 (2) 24.2 T71K3 (6) 43.6
3A1C3 (7) 13.9 7A1T3 (3) 27.6 T71K3 (7) 41.4
3A1C3 (8) 34.9 7A1T3 (4) 27.1 T71K3 (8) 31.9
5. Transformed competent DH5α cells with vector pET27b HR and then spread them on K plate. The plate was then put into the incubator at 37°C
26 July (Tue)
1. Restriction cut using HR and T7
Buffer 3 2.5ul
BSA 0.25ul
EcoR1 0.5ul
Pst1 0.5ul
DNA (35.3ng/ul) 14.25ul
H2O 7.0ul
Total 25ul
Buffer 3 2.5ul
BSA 0.25ul
EcoR1 0.5ul
Pst1 0.5ul
DNA (180ng/ul) 21.25ul
Total 25ul
Incubate at 37oC for 2hrs
2. Run gel
Result: HR: ~800bp
T7: 200bp
3. Gel recovery
4. 3-way assembly
H2O 11ul
10X T4 DNA ligase buffer 2ul
T4 DNA ligase 1ul
HR 2ul
T7 2ul
1A3 2ul
Total 20ul
5. Prepared 5 conical flasks
LB with 50μl IPTG
LB of 0.4 M NaCl with 50 μl IPTG
LB of 0.6 M NaCl with 50 μl IPTG
LB of 0.4 M KCl with 50 μl IPTG
LB of 0.6 M KCl with 50 μl IPTG
6. 5 start cultures were also prepared
5ml LB + 5 μl antibiotic K
5ml of 0.4M NaCl + 5 μl antibiotic K
5ml of 0.6M NaCl + 5 μl antibiotic K
5ml of 0.4M KCl + 5 μl antibiotic K
5ml of 0.6M KCl + 5 μl antibiotic K
27 July (Wed)
1. Transform terminator (iGEM plate2 24C) into DH5a
2. Restriction cut
HR1K3 and HR-T71A3 (3-way assembly) by EcoR1 and Pst1
3. Run gel
Ladder mix together, cannot see size
4. Spread plates
6 K-plates of 24C terminator
5. Measured the absorbance of the 5 conical flasks prepared on the 26/7 by cell counting machine with the following result
Start culture LB KCl 0.4M NaCl 0.4M KCl 0.6M NaCl 0.6M
First measurement (4X) 0.430 0.674 0.410 0.380
Second measurement
(4X) 0.401 0.636 0.431 0.488 0.348
Preciously, we use the qViro cell counter
Result
Time (h)/ culture LB KCl 0.4M NaCl 0.4M KCl 0.6M NaCl 0.6M
0 0.023 0.046 0.027 0.022 0.025
0.5 0.025 0.038 0.029 0.029 0.027
1.0 0.036 0.032 0.026 0.039 0.048
1.5 0.078 0.038 0.035 0.043 0.041
2.0 0.142 0.104 0.057 0.038 0.040
2.5 0.295 0.154 0.113 0.053 0.053
3.0 0.437 0.287 0.179 0.077 0.067
3.5 0.601 0.408 0.270 0.126 0.104
4.0 0.796 0.580 0.373 0.162 0.146
28 July (Thur)
1. Collect plates from 27/7, store at 4oC
2. Run gel
3-way assemblt plasmid made yesterday
No bands shown
3. Restriction cut of pSB1A3
Buffer 2 2.5ul
BSA 0.25ul
EcoR1 0.5ul
Pst1 0.5ul
H2O 16ul
DNA 5.25ul
Total 25ul
37oC for 2hrs
4. Run gel
No bands shown
5. Measured the absorbance change over time of the flask LB IPTG (100ml) with DH5α transformed with pET27b measured and counted the cells in CSLB G12
Result
Time (h) OD600 Cell Count (particle per ml)
0 -0.004 4.5 X 108
0.5 -0.002 5.2 X 108
1.0 ±0.000 6.7 X 108
1.5 +0.002 8.7 X 109
2.0 +0.007 1.8 X 109
2.5 +0.026 1.8 X 109
3.0 +0.041 3.1 X 109
3.5 +0.061 4.8 X 109
29July (Fri)
1. Run gel
45min, 120V
6X loading dye: 4ul, DNA: 20ul
Lane 1 2 3 4 5 6 7 8
ladder 1G cut T7 cut HR cut
Result
- lane 3: 1000-1500bp & 2000-3000bp
- lane 4: 100-200bp
- lane 5: 500-1000bp
2. Gel clean of T7, HR, 1G
Labeled: “T7 28/7 Mo”, “HR 28/7 Mo”, “1G 29/7 Mo”
Stored in 4 oC fridge
3. Ligation using T7, HR, 1G
Incubated at 16 oC
HR 7ul
T7 7ul
1G 2ul
Ligation buffer 2ul
T4 ligase 1ul
H2O 1ul
TOTAL 20ul
4. 100mM MQAE solution and alinquoted into 1.5ml black microcentrifuge tube with 500μl each stored at -20°C. 5μl MQAE and 95μl salt solution were added to microplate and microplate readers was used in SC 127.
MQAE
Mass (mg) 100
Molar mass (g mol-1 ) 326.1893
Concentration (mM) 100
Volume made (ml) 3.066
Concentration of the salt solution with 2-fold dilution
i. 100mM NaCl
ii. 50mM NaCl
iii. 25mM NaCl
iv. 12.5mM NaCl
v. 6.25mM NaCl
vi. 3.125mM NaCl
Final concentration of MQAE in microplate reader is 5mM
30July (Sat)
1. PCR amplification of T7 & HR
Labeled as T7 1, T7 2, HR
31July (Sun)
1. Run gel using PCR product
2. Gel recovery
1 tube of HR, 1 tube of T7, each of 30ul
3. Digestion
1G, 3A1C3, 5A1K3, 7A1T3
Use products to run gel, obtain backbone
4. Ligation
(HR, T7) & (1C3, 1K3, 1T3 backbone)
4 samples: T71K3, T71T3, HR1K3, HR1C3
Incubated at 16 oC, overnight
5. Transformation
use competent cell prepared on 30/6
4 samples: 3A1C3, 3A1T3, 5A1K3, 1G
Spread plates: using A,K,C,T plates, each type 2 plates
Monday 1 Aug – Sunday 7 Aug
1 Aug (Mon)
1. PCR amplification of T7 and HR
2. PCR purification of T7 and HR
3. Transformation
1G, 3A, 5A, 7A
-Used DH5a competent cells
-2 sets are prepared
HR1C3, HR1K3, T71T3, T71K3
-Used DH5a competent cells
-2 sets are prepared
chloride sensor
-Used DH5a competent cells
-1 tube is prepared
4. Spread plate
One plate is used for each tube of transformed competent cells
All plates stored in incubator at 37oC
5. Run gel to check size
Result: HR: ~800
T7: ~100-200
6. Prepared 1 flask comprising 100ml LB, 50μl IPTG and 100μl antibiotic K and also 1 DH5α with pET27b HR start culture
2 Aug (Tue)
1. Inoculation
HR1K3 (failed)
HR1C3
T71K3 (failed)
T71T3
3A
5A
7A
1G
Chloride sensor (failed)
2. Restriction cut
HR, T7, 1T3
3. Ligation
HR1T3 and T71T3
Store at -16oC overnight
4. Transfer to 125ml conical flask for MIDI Pre
5. Transformation
24C terminator and DH5a used
each spread on 2 plates
6. Prepare agar plate
C plates x18
A plates x20
K plates x21
7. Absorbance of the start culture was measured and the cells were counted
Time (h) OD600 Cell count (cell/ml)
0 0.000 4 X 108
0.5 0.003 1.4 X 1010
1.0 0.008 8.6 X 107
1.5 0.022 3.3 X 108
2.0 0.142 3 X 108
2.5 0.203 7 X 108
3.0 0.263 /
Result
Brian suggested that the abnormality of the cell count data might be due to the growing size of the bacteria. At 3.0 hour, signal could not be obtained as well as the reason.
3 Aug (Wed)
1. Mini prep
3A
5A
7A
T71T3
Cl sensor
2. 3-way assembly
Ng/ul 260/280
3-way 12.8 1.93
Cl sensor 1.2 1.85
T71T3 13.0 1.93
HR1C3 103.0 (15.9) 1.33
5A 35.3 1.87
7A 24.2 1.90
3. Concentration of the NaCl solution was prepared as follow by serial dilution
1000mM NaCl
500mM NaCl
100mM NaCl
50mM NaCl
25mM NaCl
12.5mM NaCl
6.25mM NaCl
3.125mM NaCl
4. Concentration of MQAE was also prepared as follow by serial dilution
100mM MQAE
10mM MQAE
1mM MQAE
5. 95μl of NaCl solutions and 5 μl of MQAE solutions were added into the microplate in the position as shown below.
As a result, the final MQAE concentration
A1-A4,B1-B4, C1-C4, D1-D4, E1-E4, F1-F4, H1-H4 are 5mM
A5-A8, B5-B8, C5-C8, D5-D8, E5-E8, F5-F8, H5-H8 are 0.5mM
A9-A12, B9-B12, C9-C12, D9-D12, E9-E12, F9-F12, H9-H12 are 0.05mM
The plate with aluminum foil was wrapped and put in the incubator at 37°C for 1 hour and measured emission by microplate reader
Result
1 2 3 4 5 6 7 8 9 10 11 12
5480 5633 5428 5554 3013 3267 3058 3209 1249 1335 1341 1267
8990 9199 9483 9446 5235 5222 5241 4649 1545 1646 1634 1630
763 21493 21870 23048 11411 11549 11711 10767 2564 2513 2549 2413
25542 29517 27811 29312 14561 14986 14392 14646 3056 3018 2848 2839
30141 32470 33457 27985 17182 17219 14902 19335 3351 3318 2974 2931
37055 36110 39855 35193 18985 18717 18398 16975 3565 3349 3216 3366
34258 36477 37255 35236 18320 18588 18778 6182 3425 3211 3424 3265
36893 37123 37393 35904 13574 25312 19447 1334 3386 3529 3191 3364
A: 1000mM NaCl
B: 500mM NaCl
C: 100mM NaCl
D: 50mM NaCl
E: 25mM NaCl
F: 12.5mM NaCl
G: 6.25mM NaCl
H: 3.125mM NaCl
4 Aug (Thu)
1. Mini prep
ng/ul 260/280
24C (1) 44.1 1.77
24C (2) 59.7 1.76
T71K3 (1) --- ---
T71K3 (2) 41.7 1.87
HR1K3 (1) 18.5 1.92
HR1K3 (2) 29.5 1.78
3A (1) --- ---
3A (2) 50.7 1.88
5A (1) 44.4 1.85
5A (2) --- ---
1G (1) 142.9 1.86
1G (2) 52.4 1.89
7A 43.5 1.86
3A (1) is red while 3A (2) is milky
1G (1) is red while 1G (2) is milky
2. Double digestion
T71K3
Buffer 2 2ul
BSA 0.2ul
EcoR1 0.5ul
Spe1 0.5ul
T71K3 (prepared on 4/8) 16.8ul
Total 20ul
HR1C3
Buffer 2 2ul
BSA 0.2ul
EcoR1 0.5ul
Pst 1 0.5ul
HR1C3 (prepared on 3/8) 16.8ul
Total 20ul
7A
Buffer 2 2ul
BSA 0.2ul
EcoR1 0.5ul
Pst 1 0.5ul
7A (prepared on 3/8) 4ul
H2O 12.8ul
Total 20ul
-37oC, 2hours
3. 3-way ligation
T4 ligase buffer 2ul
T4 ligase 1ul
T7 10ul
HR 4ul
Vector (7A) 3ul
Total 20ul
4. Inoculation
Pick colony of white from T71T3, HR1T3
5 Aug (Fri)
1. Nanodrop
Samples prepared on 4/8 ng/ul 260/280
HR1T3 (1) 10.3 1.98
HR1T3 (2) 12.2 1.91
T71T3 (1) 10.5 1.82
T71T3 (2) 12.4 1.86
2. Transformation
used DH5a competent cells
only 1 set is prepared using 3-way ligation products
Plate was spreaded after transformation using T plates
(plates labeled: 5/8transformation, 3A ligation)
store st 37oC
3. Pick colonies
pick from T71T3
3 colonies are picked
inoculate for 12-16hrs
3 snapcap tubes, 37oC, 250rpm
7 Aug (Sun)
1. inoculation form plates HR-T7-1T3 prepared on 6/8
2. pick 3 colonies to snap-cap tubes with 6ml LB, then shake at 250rpm, 37oC for 12-16 hrs
3. Prepared and inoculated four tubes of the start culture with the volume of 10ml , which are 0.4M NaCl LB with light, 0.4M NaCl LB without light , LB with light, and LB without light. But we didn’t add IPTG.
4. Measured OD 600 of four start culture
0.4M NaCl LB with light 0.4M NaCl LB without light LB with light LB without light
OD600 (2X) 0.230 0.401 0.388 0.690
5. Spin four tubes of start culture separately to remove the LB/NaCl LB then store in -80°C refrigerator.
6. Prepared four tubes of start culture with the total volume of 10 ml, which 0.4M NaCl LB with light, 0.4M NaCl LB without light, LB with light and LB without light and inoculated them overnight 5μl of 1M IPTG was added
Monday 8 Aug – Sunday 14 Aug
8 Aug (Mon)
1. Mini prep 3-way ligation products prepared on 7/8
Result
ng/ul 260/280
3-way ligation 11.5 1.83
HR-T7-1T3 (1) 13.9 1.86
HR-T7-1T3 (2) 13.2 1.91
T71T3 (1), prepared on 6/8 29.4 1.52
T71T3 (2) , prepared on 6/8 7.3 1.69
T71T3 (3) , prepared on 6/8 5.4 1.74
DNA ladder used is from Fermentas GeneRuler 1kb DNA, #SM1331
2. Run gel
3. Double digestion
Buffer 2 2ul
BSA 0.2ul
EcoR1 0.5ul
Spe 1 0.5ul
T71T3 (prepared on 6/8) 16.8ul
Total 20ul
Buffer 2 2ul
BSA 0.2ul
XBa 1 0.5ul
Pst 1 0.5ul
HR1K3 (prepared on 4/8) 16.8ul
Total 20ul
Buffer 2 2ul
BSA 0.2ul
EcoR1 0.5ul
Pst 1 0.5ul
3A (prepared on 4/8) 2ul
H2O 14.8ul
Total 20ul
37oC, 2hrs
4. Ligation
T4 ligase buffer 2ul
T4 ligase 1ul
T7 7ul
HR 7ul
Vector pSB1C3 from 3-way 3ul
Total 20ul
16oC overnight
5. Measured OD600 of the four start cultures of 10ml of IPTG made on 7/8 then spin four tubes of start culture separately to remove the LB/NaCl LB
Put in the -80°C refrigerator for storage.
6. Prepared again four tubes of 10ml of start culture
LB of 0.4M NaCl with light
LB of 0.4M NaCl without light
LB with light
LB without light
Inoculated them with the addition of 5μl of 1M IPTG.
7. Measured OD600 of the four start cultures.
Result:
OD600 of the four start cultures of 10ml of IPTG made on 7-8-2011
LB of 0.4M NaCl with light LB of 0.4M NaCl without light LB with light LB without light
OD600 (2X) 0.328 0.503 0.875 0.934
OD600 of the four start cultures were measured.
LB of 0.4M NaCl with light LB of 0.4M NaCl without light LB with light LB without light
OD600 (2X) 0.357 0.526 0.390 0.627
Spin four tubes to remove the LB/LB NaCl
Store in -80°C refrigerator.
9 Aug (Tue)
1. Transformation of 3-way ligation clone prepared on 8/8
2. Transformation of T71T3 mini prep product prepared on 6/8
3. Transformation of 3-way ligation prepared on 8/8
All experiment were done following the standard transformation protocol, except that for: 1. 2ul added, 2. 2ul added, 3. 5ul added
4. Spread plates with antibiotics C, T respectively
5. Pick colony from T71T3, HR1T3, 3-way ligation plates from refrigerator and then inoculate overnight
6. We unfortunately make a mistake that because the OD was measured and spinned all of the solution, whereas the start solution should be spinned with accordance with the volume calculated from the measurement of the OD. Therefore, the whole experiment needs to be redone.
10 Aug (Wed)
1. Mini prep of T71T3, HR1T3, 3-way ligation from 9/8
ng/ul 260/280
T71T3 (1) 111.0 1.84
T71T3 (2) 109.9 1.85
T71T3 (3) 147.9 1.90
HR1T3 (1) 103.0 1.89
HR1T3 (2) 98.9 1.85
HR1T3 (3) 107.6 1.84
3A (1) 101.2 .182
3A (2) 123.6 1.88
3A (3) 210.0 1.87
all are using 50ul H2O to elute al the final step, except that all tubes of 3 had been added 30ul to increase concentration
2. inoculation
Pick 3 colonies from 3 plates respectively, totally of 9, from
3-way ligation(8/8) after mini prep done on 9/8
3-way ligation(8/8) done on 9/8
T71T3 (6/8) done on 9/8
Labeled as follows:
3-way post miniprep (1)
3-way post miniprep (2)
3-way post miniprep (3)
3-way (1)
3-way (2)
3-way (3)
T71T3 (1)
T71T3 (2)
T71T3 (3)
3. Inoculated 4 DH5α with pET27b HR start cultures namely,
LB + IPTG +K with light
LB + IPTG +K without light wrapped with aluminum foil
LB + 0.4M NaCl + IPTG +K with light
LB + 0.4M NaCl + IPTG +K without light wrapped with aluminum foil
11 Aug (Thu)
1. Miniprep of 9 tubes prepared on 10/8
Tube Concentration (ug/ul) 260/280
3A Post mini prep (1) 96.1 1.91
3A Post mini prep (2) 41.6 1.96
3A Post mini prep (3) 100.5 1.85
3A (1) 104.7 1.85
3A (2) 68.8 1.87
3A (3) 74.7 1.96
T71T3 (1) 87.3 1.79
T71T3 (2) 115.8 1.85
T71T3 (3) 135.9 1.91
all no. 3 tubes are eluted with 30ul 60 oC water to increase yield and concentration
2. Transform plate 2 24C terminator
use competent cell made on 30/6
24C terminator mini-prep on 4/8 by Eric
Plate stored at 37 oC incubator, overnight
Remaining transformed 24C terminator stored at -20 oC,
labeled as “ transf. 24C, 11/8,ii)
3. Sequencing
9 tubes prepared on 10/8, 9 tubes prepared on 11/8
4. Measured the OD600 of the 4 start cultures prepared on 10/8
LB of 0.4M NaCl with light LB of 0.4M NaCl without light LB with light LB without light
OD600 (2X) 0.266 0.267 0.302 0.286
5. 10% SDS was diluted into 2% SDS by adding the autoclaved 40ml of distilled water and 10ml of 10% SDS based on the insensitivity of SDS
6. Measure the OD600 of the second set without IPTG
LB of 0.4M NaCl with light LB of 0.4M NaCl without light LB with light LB without light
OD600 (2X) 0.094 0.096 0.350 0.355
Volume to be spinned (ml) *All *All 4.5 4.5
All volume to be spinned because the OD of NaCl sets are too small so the total volumes are still inadequate. As a result, a back up set without IPTG by inoculation was prepared and collected on 12-8-2011. It was found that the DH5α plate has been used up for cline picking so later transformation and plate spreading is need. Besides, it was found that there is only little amount of 1000K anti-biotic too.
12 Aug (Fri)
1. Inoculation
pick 3 colonies from plate “24C terminator transformed 11Aug”
2. Measured the OD600 of the back up set of bacteria.
LB of 0.4M NaCl with light LB of 0.4M NaCl without light LB with light LB without light
OD600 (2X) 0.459 0.290 0.768 0.847
Volume to be spinned (ml) 3.5 5.5 2 1.9
3. Pellets after spinning down were stored in -80°C refrigerator
2% of 100μl of SDS was used to lyse the cells in 99°C for 5 minutes
Serial dilution of the bacteria in 2X, 4X, 8X and 16X and of salt like previously done on 3/8 were done
The MQAE and the solutions were added into the microplate and incubated for an hour
4. Measured the MQAE fluorescence with microplate reader
The data were abnormal and Frankie deduced that it may be due to the bubbles of 2% SDS
13 Aug (Sat)
1. Miniprep of 24C terminator prepared on 12/8
3 tubes are labeled as “24C (1) 13/8”, “24C (2) 13/8”, “24C (3) 13/8”
Monday 15 Aug – Sunday 21 Aug
15 Aug (Mon)
1. Transformed pET27bHR into DH5α and spread on a K plate
16 Aug (Tue)
1. Inoculated LB IPTF, 0.4M NaCl IPTG, 0.4M NaCl IPTG with light, 0.4M KCL IPTG and 0.4M KCl IPTG without light with DH5α pET27b
17 Aug (Wed)
1. Measured the OD 600 of the back up set of the bacteria
set up LB + IPTG without light NaCl + IPTG with light NaCl + IPTG without light KCl + IPTG with light KCl + IPTG without light
OD600 (2X) 0.857 0.724 0.733 0.316 0.660
Volume to be spinned down (ml) 1.762 2.086 2.060 4.778 2.288
2. 2% of SDS was spinned to lyse the cells in 99°C for 5 minutes with 100μl each, Serial dilution of the bacteria in 8X, 16X, 32X, 64X and of salt like previously done was carried out. The MQAE and solutions were added into the microplate and inoculated for an hour.
3. Measured the MQAE fluorescence with microplate reader
The data was also abnormal and Frankie deduced that it may be also due to the bubbles of the 2% SDS.
4. Inoculated the following tubes with DH5α pET27b
LB + IPTG
0.4M NaCl + IPTG without light
0.4M NaCl + IPTG with light
0.4M KCl + IPTG without light
0.4M KCL + IPTG with light
( 10μl K and 5μ of IPTG)
18 Aug (Thu)
1. Run gel with PCR products (T7, HR)
Result: HR did not show band with 800 bp
2. Run gel using PCR product (T7)
Result: the samples show unclear result
3. PCR with T7 & HR
4. PCR purification of PCR product of step 3
5. Measured the OD600 of the back up set of the bacteria
set up LB + IPTG without light NaCl + IPTG with light NaCl + IPTG without light KCl + IPTG with light KCl + IPTG without light
OD600 (2X) 0.862 0.242 0.751 0.797 0.252
Volume to be spinned down (ml) 2.8 10 3.2 3.0 9.6
6. 2% of SDS was spin to lyses the cells in 99°C for 5 minutes with 100μl each, Serial dilution of the bacteria in 8X, 16X, 32X, 64X and of salt like previously done was carried out. The MQAE and solutions were added into the microplate and inoculated for an hour.
7. MQAE fluorescence was measured with microplate reader
The data was abnormal and may be due to the bubbles of the 2% SDS.
19Aug (Fri)
1. Run gel to check size of PCR amplified T7 & HR prepared on 18/08
7. HR: result failed, at ~100bp
8. T7: result ok, at 100-200bp
20Aug (Sat)
1. Inoculation of 3 plate prepared last night
6 tubes prepared
Abandoned because MidiPrep cannot be done on Sunday, will do miniprep instead)
2. PCR with HR templates (2tubes)
3. Restriction vut T7 prepared on 18/8 & backbone 5A1C3
1tube of T7
Buffer 2ul
BSA 0.2ul
EcoR1 0.4ul
Pst1 0.4ul
T7 15ul
H20 2ul
TOTAL 20ul
2tubes of backbone
Buffer 2ul
BSA 0.2ul
EcoR1 0.4ul
Pst1 0.4ul
backbone 10ul
H20 7ul
TOTAL 20ul
4. PCR purification of PCR product HR (2tubes) (continued step 2)
5. Run gel to check size of HR purified product
Run 50ul of each HR and do gel recovery
Each lane of HR with 25ul
Result: size correct, ~800bp
Lane 1 2 3 4 5 6
--- 100bp ladder HR-1 HR-1 HR-2 HR-2
6. Ligation of T7 & 1C3, overnight
3 tubes
T4 ligase buffer 2ul
T4 ligase 1ul
T7 3ul
1C3 14ul
TOTAL 20ul
7. Inoculation of 24C terminator DH5a
21 Aug (Sun)
1. Miniprep 6 tubes of 24C terminator
2. Transformation:
T71C3 (1) prepared on 20/8
1G1A3
3A1C3
5A1K3
7A1T3
Spread plate:
- white colonies: T71C3
- red colonies: 1G1A3, 3A1C3, 5A1K3, 7A1T3
3. Restriction cut of HR and backbone 1C3
HR: 10ul
Backbone X2: total 40ul
4. Ligation of HR & 1C3, overnight
3 tubes labeled as “HR1C3(1-3)”
5. Inoculated with DH5α pET27b
LB + IPTG
0.4M NaCl + IPTG without light
0.4M NaCl + IPTG with light
0.4M KCl + IPTG without light
0.4M KCL + IPTG with light
( 10μl K and 5μ of IPTG)
Retrieved from "http://2011.igem.org/Team:Hong_Kong-CUHK/Laboratory_log_book"