%0 Journal Article %A Roberts, Marilyn %A Piot, Peter %A Falkow, Stanley %T The Ecology of Gonococcal Plasmids %D 1979 %J Microbiology, %V 114 %N 2 %P 491-494 %@ 1465-2080 %R https://doi.org/10.1099/00221287-114-2-491 %I Microbiology Society, %X 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. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-114-2-491