Preparation

iGEM parts / ligation products

SOC or LB (No antibiotic)　500μL

TE　15μL

plates

ice box

heat block(42°C)

competent cells

→ always on ice! Melt on ice! Mix DNA as soon as cells melt!

Protocol

to thaw out igem parts

1. With a pipette tip, punch a hole in the foil
2. Add 15uL of TE (MilliQ),and pipetting
3. Pipette 1uL of the resuspended DNA Transformation into your desired competent cells
4. Hold on ice for 30 mins
5. Heat shock at 42°C for 45 seconds (and on ice after it)
6. Add 300uL of LBborth in each epp
7. Wait for 10 mins
8. Hold at 37℃ for 30 mins

   (this step can be skipped with ampicillin selection)

9. Plate out
10. Incubate at 37°C

Preparation

kit of Promega (SVMinipreps)

incubative tube

1.5ml epp tube

MilliQ

Procedure

1. pour contents out of the incubative tube into the 1.5ml tube as you can
2. centrifuge for 10min (15,000rpm)

   (you can centrifuge incubative tube directly when it can endure up to 6,000g )

3. throw supernatant fluid away not to damage the precipitation

   ( you should decant by using yellow tip first / remove culture medium as you can / throw waste water away in bio hazard!)

4. add 250μl cell resuspension solution (red label)、suspend completely

   (incomplete suspending decreases yields / you should use epp stand like a washboard)

5. add 250μl Cell lysis solution（green label）
6. turn the tube upside down four times slowly not to bubble
7. add 10μl Alkalin　Protease　Sol. （small bottle）
8. turn the tube upside down four times slowly not to bubble
9. wait for 5min （Be careful not to exceed 5min! colon bacillus will disintegrate too much!）
10. add 350μl Neutralization Sol. (blue label）
11. turn the tube upside down four times slowly not to bubble
12. centrifuge for 10min (15,000rpm)
13. put the supernatant fluid to column (germ’s wreckage is adhering below)
14. centrifuge for 1min (15,000rpm)
15. throw flow through (the liquid in the tube below) away
16. add 750μl Wash Sol. to column and centrifuge for 1min (15,000rpm)
17. throw flow through away, put 250μl Wash Sol. to column and centrifuge for 1min (15,000rpm)
18. change the column into 1.5ml tube and centrifuge for 2min (15,000rpm)
19. change the tube into new one and add 50μl MilliQ

    (use Nucleas-Free Water in the kit instead of MilliQ)

20. centrifuge for 1min (15,000rpm) after waiting for 1min
21. take 1 to 1.5μl and determine the concentration by NanoDrop (Don’t dilute)
22. label them

Preparation

Kit of promega

Gel

Procedure

1. Gel Slice and PCR Product Preparation

   Dissolving the Gel Slice

   1. Cut out gel with wanted band and put it in a tube.
   2. Add 3 parts Mem. binding sol. to 1 part Gel volume.

   Processing PCR Amplifications

   1. Add an equal volume of Membrane Binding Solution to the PCR amplification.
2. Shake & Incubate at 50-65 degrees C until gel is completly dissolved.
3. Put in the column.
4. Centrifuge at 15,000 rpm for 1 minute
5. Empty collection tube and add 700 ul Mem. Wash sol, centrifuge for 1 minute.
6. Empty collection tube and add 500 ul Mem. Wash sol, centrifuge for 1 minute.
7. Change the column to a new 1.5 ml Eppendorf and centrifuge at 15,000 rpm for 1 minute.
8. Change the old tube to a new 1.5 ml Eppendorf, add 30ul Nuclease-Free Water, incubate at RT for 1 minutes, then centrifuge at 15,000 rpm for 1 minute.
9. Measure concentration, label the Eppendorf.

Notes

Percent Recovery Versus Double-Stranded DNA Fragment Size

DNA Fragment Size	Percent Recovery
55bp	26%
100bp	84%
1,000bp	92%
23,130bp	47%

Preparation

100%, 70% Ethanol

TE buffer

Miniprep products

Procedure

1. Add 2 volumes ice cold absolute ethanol to sample.
2. Incubate 1 hr at -80°C.

(The long incubation time is critical for small fragments)

1. Centrifuge for 30 minutes at 0°C at maximum speed (generally >10000 g at least).
2. Remove supernatant.
3. Wash with 750-1000 ul room-temperature 95% ethanol.
4. Centrifuge for 10 minutes at 4°C at maximum speed (generally >10000 g at least).
5. Dry the pellet. For this you can air dry (tubes open, ~15 min).

   (Overdrying can make DNA hard to re-dissolve)

6. Add 10 ul TE buffer. Vortex and spin down to resuspend.
7. Determine the concentration by NanoDrop.

Notes

Pellets can be very small and hard to see. Make sure that you don't break invisible pellets on all steps.

Preparation

0.25% agar LB plate

Protocol

1. Pick single colony using a pipetman with sterile tip.
2. Inoculate tip with colony into 0.25% agar plate.

Notes

0.25% agar plate is fragile. You should keep it horizontal.

JM109 (Takara Bio INC.)

• Genotype:

recA1, endA1, gyrA96, thi-1, hsdR17(rK-mk+), e14–(mcrA–), supE44, relA1, Δ(lac-proAB)/F' [traD36, proAB+, lac Iq, lacZΔM15]

BL21(DE3)

• Genotype:

F- ompT hsdSB (rB-mB-) gal dcm (DE3)

ccdB survival (invitrogen)

• Genotype:

F- mcrA Δ(mrr-hsdRMS-mcrBC) Φ80lacZΔM15 ΔlacX74 recA1 araΔ139 Δ(ara-leu)7697 galU galK rpsL (StrR) endA1 nupG fhuA::IS2

JW 1970 (cheZ-)

derived from K12 BW25113

• Genotype

(araD-araB)567, lacZ4787(::rrnB-3), lambda-, rph-1, (rhaD-rhaB)568, hsdR514

details available at http://ecoli.aist-nara.ac.jp/GB6/info.jsp?id=JW1870

DH5α (invitrogen)

• Genotype:

F- φ80lacZΔM15 Δ(lacZYA-argF)U169 recA1 endA1 hsdR17(rk-, mk+) phoA supE44 λ-thi-1 gyrA96 relA1 tonA

CJ236 (Takara Bio INC.)

• Genotype:

dut1, ung1, thi-1, relA1/pCJ105（F' camr）