Fig. 3.

Cluster formation of mCherry-CadC is reversible. Fluorescent microscopic images of E. coli MG1655/pET-mCherry-cadC cells grown in a microfluidic growth chamber. a Cells were initially grown at pH 7.6 and then the medium flow was switched to stress conditions (pH 5.8+lysine). b Cells were initially grown at pH 5.8+lysine and then the medium flow was switched to non-stress conditions (pH 7.6). PH phase contrast, scale bar = 2 µm