Fig. 4. Localization of ZipA, FtsZ and FtsA in ftsA12 (Ts) zipA1 (Ts) cells. A culture of PS234 [zipA1 (Ts) ftsA12 (Ts)] growing exponentially at 30°C was shifted to 42°C. Samples were taken before and at the indicated times after the shift to 42°C. The antibodies used for staining are indicated at the top of the figure.