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BCCS-Bristol 2010 Biobrick
First Experience with BBa_k381001
First experience with BBa_k381001
Objective:
1. Test operation in liquid LB at 37 ° C and to K2NO3 50 mM.
Methodology:
1. We used six falcon tubes of 25 mL. Three tubes were used for inoculation of the colonies from 06/09/11 and 12/09/11.
2. Two positive controls were prepared and one negative control for each test.
3. To positive control tubes we added 10 ml of liquid LB, 10 mL of chloramphenicol (33μg/mL) and 500 µL of K2NO3 50 mM.
4. Al tubo para control negativo se le agrego lo mismo, excepto K2NO3. To negative control tube we added the same amount specified in the previous line, except K2NO3.
5. Each tube was inoculated with the colonies; three of them with the conlonies from 06/09/11 and the rest with colonies from 12/09/11.
6. Tubes were incubated at 37 ° C for 48 hours.
After 48 hours we noticed that all the tubes for both tests showed no change, including positive and negative controls. Our experiment was based on BCCS-Bristol experiment. While reviewing the experiments of Edinburgh in 2009, who designed the promoter used in the BioBrick BCCS-Bristol, we realized that the promoter express better in minimal essential medium than in LB, but we do not rule out that we could have made a mistake in the experience preparation prevented us from showing the right results, which is why we decided to do the experiment again.
Second Experience
Objectives:
1. Test the BioBrick operation to different substrates and temperatures, using K2NO3 40 mM:
a. Substrates:
i. LB
ii. Minimal essential medium
iii. Saline solution
b. Temperatures:
i. 8°C
ii. 23°C
iii. 37°C
2. Improve the characterization of the BioBrick tested in other substrates to study the performance of the promoter.
3. Define the Biobrick promoter strength at the temperatures and selected substrates.
Methodology
According to the characterization made by Team Edinburgh 2009, the Pyear promoter (BBa_K216005) used by Bristol 2010, works best in minimal media and complex media with a nitrate concentration of 40mM. Using this reference, we added 40mM of KNO3 to every growth media in the different temperatures for Bristol 2010 - BBa_K381001 and UTP-Panama 2011 – BBa_K672000.
5. We used nine falcon tubes of 25 mL. Three tubes for every different substrate.
6. To each tube we added 10 ml of liquid LB, 10 mL of chloramphenicol (33μg/mL) and 500 µL of K2NO3 40 mM.
7. Tubes corresponding the different substrates were inoculated with BBa_K381001.
8. Tubes were incubated at 37, 8 and 23 ° C overnight.
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