%0 Journal Article %A COETZEE, J. N. %A DATTA, NAOMI %A HEDGES, R. W. %T R Factors from Proteus rettgeri %D 1972 %J Microbiology, %V 72 %N 3 %P 543-552 %@ 1465-2080 %R https://doi.org/10.1099/00221287-72-3-543 %I Microbiology Society, %X SUMMARY: Of 12 R factors transferred from wild strains of Proteus rettgeri to Escherichia coli K12, all were fi - Five were of the N-compatibility group; three belonged to a newly defined group T, of which Rts1 is the prototype; one belonged to group W. The other three constituted at least one compatibility group, not previously described. The replication of two of the T plasmids, like that of Rts1, was temperature sensitive. This set of R factors is significantly different from those derived from bacteria of other genera. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-72-3-543