Filamentation

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Filamentation is the anomalous growth of certain bacteria, such as E. coli, in which cells continue to elongate but do not divide (no septa formation). Bacterial filamentation is a defect in completing replication and is observed in bacteria responding to a various stresses. This may happen, for example, while responding to extensive DNA damage through the SOS response system.

For other uses see "Filament".