Compatibility of F-like plasmid FB1drd with standard F-group plasmids in strains of Escherichia coli K12

Compatibility of derepressed F-like plasmid FB1drd, integrated into the chromosome ofEscherichiacoli K12 cells with standard plasmids of compatibility groups FI-FVI was studied. The results show that such plasmids can coexist in a stable state in the same cell with plasmid FB1drd. This suggests that it belongs to a new compatibility group (FVII).Department of Biology and General Genetics, Patrice Lumumba Peoples' Friendship University. Research Laboratory of Experimental Immunobiology, Academy of Medical Sciences of the USSR, Moscow. Translated from Byulleten' Éksperimental'noi Biologii i Meditsiny, Vol. 85, No. 6, pp. 718–719, June, 1978.