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. 1977 Sep;131(3):929–942. doi: 10.1128/jb.131.3.929-942.1977

Origin and direction of replication of the drug resistance plasmid R100.1 and of a resistance transfer factor derivative in synchronized cultures.

L Silver, M Chandler, E B de la Tour, L Caro
PMCID: PMC235551  PMID: 330504

Abstract

The origin and direction of replication of the resistance plasmid R100.1 and its resistance transfer factor derivative, pAR132, were studied by electron microscopy autoradiography of partially denatured molecules and partial denaturation mapping of replicative intermediates. Results of these studies indicate the existence of an origin of replication at 8.8 kilobases on the R100 map. Replication from this origin in cultures synchronized for initiation of replication is predominantly unidirectional in a single direction.

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Selected References

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