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Transmission electron micrographs of polyP treated cells taken 1 h after Ca2+ was added. The arrows indicate various types of septum malformations, probably due to the hyperdivisionlike phenotype. (A) Invagination of two growing septa very close to each other. (B) Apparently uncoordinated multiple ring formation and septum growth. (C) Formation and separation of a minicell-like short rod (arrow) and normal septation (arrowheads) Bars = 0.5 μm.
