FIG. 2.

Differential expression of the colicin K cka and cki genes through the growth cycle. Shown are images of MC4100 with the cka-gfp fusion in stationary phase (A) and of MC4100 with the cki-gfp fusion in the exponential (B) and stationary (C) phases, taken under fluorescence microscropy (left panels) and bright-field microscopy (right panels). The experiments were repeated four times, and representative results are shown.