Excision and integration of a self-transmissible replicon of Streptomyces ambofaciens.


When Streptomyces ambofaciens OSF was crossed with the plasmid-free Streptomyces lividans TK24, almost all S. lividans exconjugants contained the free 11.1-kb plasmid pOS1. Southern hybridizations showed that pOS1 was derived from the integrated copy of previously recognized plasmid pSAM2 present in strain OSF. A shorter derivative of pOS1 was constructed… (More)


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