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Fluorescence micrographs of B. subtilis FG347 bacteria that express a GFP-tagged, Z-ring marker protein, ZapA. The bacteria were cultured for 1 h in the presence of DMSO (solvent control) (A), TXY436 at 3 μg/ml (B), or PC190723 at 3 μg/ml (C), at which point GFP-ZapA expression was induced by the addition of xylose. The bacteria were incubated for an additional hour at 37°C and then visualized by fluorescence microscopy. The arrows in panel A highlight FtsZ Z-rings at midcell.
