Difference between revisions of "Part:BBa K354000:Experience"
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===Applications of BBa_K354000=== | ===Applications of BBa_K354000=== | ||
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| + | == IPTG activates the Lac/AraC promoter == | ||
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| + | A culture of 2ml of ''E. coli'' containing a construct with the Lac/AraC promoter in front of YFP variant Venus was grown overnight at 37°C and then transferred to 25 ml of ampicillin LB broth. This culture was then grown at 37°C in a shaking incubator for 2.5 hours so as to ensure that the bacteria were in their exponential growth phase. A baseline reading (Fig 1) was taken at this point (Tile A), to determine the presence of non-specific promoter activation. 10% 1mM IPTG was then added and the culture returned to the shaking incubator. An aliquot was then imaged after 30min (Tile B), and again after 1 hour (Tile C). All aliquots used in imaging were 100 ul. | ||
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| + | As is seen in the baseline image (Tile A), the degree of fluorescent activation is minimal before the addition of IPTG. Tile B shows the fluorescent activation after 30min incubation with IPTG - there is very little visible fluorescent activation. After an hour of incubation (Tile C) there is a marked increase in the degree of fluorescence, thus providing an indication that IPTG has a positive effect on the Lac/Ara-1 promoter, activating gene expression. <br /> <br /> | ||
| + | [[Image:Montage_of_M1I_d.jpg|850px]] <br /> | ||
| + | '''Figure 1. Time course fluorescent microscopy of Lacto-detect before and after induction with IPTG''' <br /> <br /> <br /> | ||
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===User Reviews=== | ===User Reviews=== | ||
Revision as of 22:00, 27 October 2010
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Applications of BBa_K354000
IPTG activates the Lac/AraC promoter
A culture of 2ml of E. coli containing a construct with the Lac/AraC promoter in front of YFP variant Venus was grown overnight at 37°C and then transferred to 25 ml of ampicillin LB broth. This culture was then grown at 37°C in a shaking incubator for 2.5 hours so as to ensure that the bacteria were in their exponential growth phase. A baseline reading (Fig 1) was taken at this point (Tile A), to determine the presence of non-specific promoter activation. 10% 1mM IPTG was then added and the culture returned to the shaking incubator. An aliquot was then imaged after 30min (Tile B), and again after 1 hour (Tile C). All aliquots used in imaging were 100 ul.
As is seen in the baseline image (Tile A), the degree of fluorescent activation is minimal before the addition of IPTG. Tile B shows the fluorescent activation after 30min incubation with IPTG - there is very little visible fluorescent activation. After an hour of incubation (Tile C) there is a marked increase in the degree of fluorescence, thus providing an indication that IPTG has a positive effect on the Lac/Ara-1 promoter, activating gene expression.
Figure 1. Time course fluorescent microscopy of Lacto-detect before and after induction with IPTG
User Reviews
UNIQ55ac71b68e1f4230-partinfo-00000000-QINU UNIQ55ac71b68e1f4230-partinfo-00000001-QINU