RT Journal Article SR Electronic(1) A1 Roberts, Marilyn A1 Piot, Peter A1 Falkow, StanleyYR 1979 T1 The Ecology of Gonococcal Plasmids JF Microbiology, VO 114 IS 2 SP 491 OP 494 DO https://doi.org/10.1099/00221287-114-2-491 PB Microbiology Society, SN 1465-2080, AB Summary: Of 261 strains of Neisseria gonorrhoeae examined for plasmids, 6 were plasmid-free, 217 contained only a small multicopy 2·6 × 106 dalton plasmid and 38 carried a large 24·5 × 106 dalton plasmid. Restriction enzyme digests and DNA-DNA hybridization studies revealed that the large plasmids isolated between 1940 and 1978 share a common core of DNA sequences (70 to 100%) and represent a group of closely related molecules., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-114-2-491