Abstract

The inactivation of rec BC nuclease activity and simultaneously the separation of 3 DNA-dependent ATPases and an ATP-independent DNases specific for single-stranded DNA have been observed after DEAE-cellulose chromatography of cell extracts from Escherichia coli. Two of the ATPases catalyze the strand separation of duplex DNA. Reconstitution of ATP-dependent DNase activity has been carried out by the combination of the separation enzymes.

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