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. 1959 Oct;6(2):221-4.
doi: 10.1083/jcb.6.2.221.

Electron microscope observations on the behavior of the bacterial cytoplasmic membrane during cellular division

G B CHAPMAN

Electron microscope observations on the behavior of the bacterial cytoplasmic membrane during cellular division

G B CHAPMAN. J Biophys Biochem Cytol. 1959 Oct.

Abstract

Bacterial cells were fixed in OsO(4), washed, dehydrated, and embedded in a methacrylate mixture. Ultrathin sections were cut on a Porter-Blum ultramicrotome and were examined in an RCA electron microscope, type EMU-2D. The sections revealed that the cytoplasmic membrane undergoes a centripetal growth to form a membrane septum. This septum is formed as a double structure. Constriction of the daughter cells and deposition of cell wall material lead to the separation of the daughter cells. The bacterial cytoplasm appears to consist largely of 200 A granules and occasionally reveals arrays of parallel dense lines.

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