Fluorescence microscopy of Bacillus subtilis cells. A-B) Strain JN6 (sbcC-yfp) growing exponentially, or C) 30 min or D) 120 min after addition of 50 ng/ml of MMC, or E) 120 min after addition of 200 ng/ml of MMC. F-G) Strain JM61 (dnaX-cfp, sbcC-yfp) 120 min after addition of MMC. White arrowheads indicate the localization of SbcC-YFP and co-localization of the protein fusions. White lines indicate septa between cells. White bars 2 μm.