Abstract
Electron microscopic examination of a composite R plasmid made up of an RTF component and an r-determinants component shows that replication may originate from either the RTF origin or the r-determinants origin of replication.
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Perlman, D., Rownd, R. Two origins of replication in composite R plasmid DNA. Nature 259, 281–284 (1976). https://doi.org/10.1038/259281a0
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DOI: https://doi.org/10.1038/259281a0
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