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Time-lapse photomicroscopy of lysis of E. coli ftsZ84 ΔPBP 5 ΔPBP 7. Numbers indicate minutes elapsed after microcolonies on agar slides were shifted to 42°C. Arrowheads indicate individual cells that lyse over time. Comparing the large colony at 50 and at 68 min reveals that many cells lysed over that period.
