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Part:BBa_E0840:Experience
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how you used this part and how it worked out.
Applications of BBa_E0840
BBa_E0840 is commonly used to quantify the function of transcriptional control devices.
User Reviews
UNIQbd30cac62504f7b1-partinfo-00000001-QINU
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Smelissali |
Very visible even without UV excitation on plate and in solution after 24 hours incubation. Not as visible as Part:BBa_I13521 (mRFP), however. |
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BBa_E0840 was successfully used to quantify the behavior of BBa_R0040, BBa_J45992 and BBa_J45994. |
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Aberdeen_Scotland 2009 |
Our miniprep, double and single digests worked as expected. We used this biobrick for building two of our parts (BBa_K182100 and 'BBa_K182101). We experienced very satisfactory cloning with high efficiency of transformants. The sequencing was correct. We discovered that all the bacteria containing this biobrick were releasing fluorescence even though there was no promoter upstream. The level of fluorescence observed was dependent on the plasmid copy number. We noticed that colonies displayed a visible, yellow-green colour, therefore selection was very easy. |
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Characterization
Transcriptional control of GFP generator
All three transcriptional control devices were quantified using BBa_E0840.
We successfully designed, constructed and tested transcriptional control devices for constitutive, stationary phase dependent and exponential phase dependent protein production (A-C). To test and verify function of our three transcriptional control devices, we assembled each control device with the GFP protein generator BBa_E0840 and monitored the fluorescence of E. coli cultures with each device over time. For each device, we plot the change in fluorescence per unit time (normalized GFP synthesis rate) versus the cell density (OD600nm) (D). The constitutive transcriptional control device produced a high GFP synthesis rate irrespective of cell density. The stationary phase transcriptional control device produced a low initial GFP synthesis rate which increased with culture cell density. The exponential phase transcriptional control device produced an initially high GFP synthesis rate which dropped off as cell density increased. Data shown are averages of triplicate measurements of cultures grown from three individual colonies of each device. Error bars are the standard deviation of the three individual cultures.