TABLE 2.

Promoter activity of the colicin K activity (cka) and immunity (cki) genes through the growth cycle at the single-cell level

Growth phase	Fluorescence (geometric mean)a
	pKCT3b	RW542c	RO98d	pKCT4e	+f	−g
Exponential	12	71.8	10	91	208	6.1
Stationary	23.3	136.3	22	137	234	6.2

^aDetermined from 10,000 individual particles per sample. Experiments were carried out in duplicate, and representative results are shown.

^bcka-gfp fusion.

^ccka-gfp fusion in RW542 lexA51.

^dcka-gfp fusion in a relA spoT mutant.

^ecki-gfp fusion.

^f+, random insertion of promoterless gfp expressed throughout the growth cycle.

^g−, plasmid pColK-K235 without gfp.