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Table 4 Cells expressing SOS regulated genes in the recA defective strain RW464

From: Genes regulated by the Escherichia coli SOS repressor LexA exhibit heterogenous expression

gfp transcriptional fusion

% of intensely fluorescent cells

Fluorescence threshold level*

Cell count

caa-gfp (pSC300)

0.075

26

9315

cna-gfp (pSC301)

0.45

26

8938

ce1a-gfp (pSC302)

0.36

26

7253

ce7a-gfp (pSC303)

0.43

26

7050

recA-gfp (pSC201)

1.69

52

5695

lexA-gfp (pSC200)

0.53

52

2823

umuDC-gfp (pSC202)

0.05

24

4004

  1. *Fluorescence threshold level is defined as the point of clear transition from basal level (large majority of cells) to high fluorescence intensity.