title: Multicopy derivative of pock-forming plasmid pSA1 in Streptomyces azureus.
abstract: Streptomyces azureus carried one copy or less of plasmid pSA1, which elicited pocks at 0.1 to 1.0%. Strain PK100 was isolated from the wild-type strain after UV irradiation. PK100 carried approximately 20 to 30 copies of pSA1.1, a derivative of pSA1. Plasmid pSA1.1 elicited pocks at 100% and inhibited spore and thiostrepton production.
mesh_terms: D010957:Plasmids; D013171:Spores, Bacterial; D013302:Streptomyces / Q000235:genetics* / Q000254:growth & development / Q000502:physiology; D013883:Thiostrepton / Q000096:biosynthesis
chemical_list: D013883:Thiostrepton