Difference between revisions of "Part:BBa K649001:Experience"

Revision as of 10:32, 1 October 2011

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Applications of BBa_K649001

Effect of 3O-C12-HSL induction on fluorescence intensity

Fluorescence intensity of BBa_K649001 was increased by 3O-C12-HSL induction.

Generally, in the presence of 3O-C12-HSL lasI promoter is activated and the transcription level of downstream gene increases. To characterize this part, we used Ptrc-lasR on pBR as regulator part.

Method ①Overnight cultures of sample strain grown at 37 °C in LB medium containing carbenicillin and kanamycin were diluted 1:100 in the medium, and then they were incubated at 37 °C as fresh cultures. ②After their OD600 reached 0.2, we added 3 µL of 500 µM 3O-C12-HSL (3O-C12-HSL+) or 3µL of DMSO (3O-C12-HSL-) into the fresh cultures. ③After 3-hour incubation at 37 °C, 0.25 mL of each culture was harvested by centrifugalization and suspended by adding 1 mL of PBS (phosphate-buffered saline). ④We dispensed 500 µL of each suspension into a disposable tube through a cell strainer, and its fluorescence intensity was measured with a flow cytometer of Becton, Dickinson and Company.

our assay of BBa_J64010

User Reviews

UNIQf80505e07aa076be-partinfo-00000000-QINU UNIQf80505e07aa076be-partinfo-00000001-QINU

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 [[Image:K649001_experience.png|thumb|center|400px|Effect of 3O-C12-HSL induction on fluorescence intensity ]]
+Fluorescence intensity of BBa_K649001 was increased by 3O-C12-HSL induction.
+Generally, in the presence of 3O-C12-HSL lasI promoter is activated and the transcription level of downstream gene increases. To characterize this part, we used Ptrc-lasR on pBR as regulator part.
+'''Method'''
+①Overnight cultures of sample strain grown at 37 °C in LB medium containing carbenicillin and kanamycin were diluted 1:100 in the medium, and then they were incubated at 37 °C as fresh cultures.
+②After their OD600 reached 0.2, we added 3 µL of 500 µM 3O-C12-HSL (3O-C12-HSL+) or 3µL of DMSO (3O-C12-HSL-) into the fresh cultures.
+③After 3-hour incubation at 37 °C, 0.25 mL of each culture was harvested by centrifugalization and suspended by adding 1 mL of PBS (phosphate-buffered saline).
+④We dispensed 500 µL of each suspension into a disposable tube through a cell strainer, and its fluorescence intensity was measured with a flow cytometer of Becton, Dickinson and Company.