Difference between revisions of "Part:BBa K3332082"
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'''Fig 3.''' Fluorescence intensity/OD600 for induction and non-induction group (6 hours). Data are collected and analyzed according to iGEM standard data analysis form after 6 hours of induction. | '''Fig 3.''' Fluorescence intensity/OD600 for induction and non-induction group (6 hours). Data are collected and analyzed according to iGEM standard data analysis form after 6 hours of induction. | ||
− | We | + | We found that the downstream gene of proBAD/araC can be expressed when induced by arabinose, while the expression of EYFP decreases without the inducer. Besides, as we can see, the purple bar is higher on the right side (when the arabinose is absent). Therefore, we can come to the conclusion that when the inverter is added, the effect is reversed. |
Revision as of 16:15, 27 October 2020
pBAD/araC promoter-RBS-EYFP-terminator
It can express cyan fluorescent protein under certain conditions.It is used to characterize the function of the MazF as a control group
Usage and Biology
Fig 1. pBAD_B0034_eyfp_B0015
This composite part is used as a control group to demonstrate the effect of inverter, comparing with proBAD/araC-inverter-EYFP-terminator (BBa_K3332079). EYFP serves as a reporter gene. By comparing the fluorescence intensity/OD600 of induced and non-induced bacteria, we can characterize the function of the inverter.
Characterization
When we were building this circuit, we did the nucleic acid gel electrophoresis experiment to verify the ligation. After the circuit was built, we sent the plasmid to sequence, and got the correct result. After new molecular cloning experiments, we did Enzyme-Cut identification for further confirmation. We used the Spe I and Pst I to cut the plasmid, then we got the target separate fragment.
Fig.2 proBAD/araC_B0034_E0030_B0015_pSB1C3 (BBa_K3332082) digested by Spe I and Pst I (about 4148 bp)
Protocol:
1. Preparation of stock solution
Dissolve arabinose in ddH2O to make 100× stock solution(the work concentration is 0.2%)
2.Culture glycerol bacteria containing the corresponding plasmid in test tube for 12h.
3.Add 4mL of the above bacterial solution into 200 mL LB medium and maintain the culture condition at 37 ℃ and 180 rpm.
4.Add 2 mL arabinose stock solution into the induction group when OD600 increased to 0.6.
5.Induce for 6 hours and the condition is the same as before.
6.Then, sampling culture in 96-well plate reader to measure the fluorescence intensity (EYFP) and corresponding OD600, then calculate the fluorescence / OD value of each group.
Here is the result:
Fig 3. Fluorescence intensity/OD600 for induction and non-induction group (6 hours). Data are collected and analyzed according to iGEM standard data analysis form after 6 hours of induction.
We found that the downstream gene of proBAD/araC can be expressed when induced by arabinose, while the expression of EYFP decreases without the inducer. Besides, as we can see, the purple bar is higher on the right side (when the arabinose is absent). Therefore, we can come to the conclusion that when the inverter is added, the effect is reversed.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12INCOMPATIBLE WITH RFC[12]Illegal NheI site found at 1205
- 21INCOMPATIBLE WITH RFC[21]Illegal BamHI site found at 1144
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 979
- 1000INCOMPATIBLE WITH RFC[1000]Illegal SapI site found at 961