%0 Journal Article %A Datta, Naomi %A Hedges, R. W. %T Host Ranges of R Factors %D 1972 %J Microbiology, %V 70 %N 3 %P 453-460 %@ 1465-2080 %R https://doi.org/10.1099/00221287-70-3-453 %I Microbiology Society, %X SUMMARY All R factors so far described can be transmitted to Escherichia coli. F-like R factors are transmissible to the Proteus group but not to the Pseudomonadaceae. Among, fi − R factors, I-like plasmids are not transferable to Proteus although they mediate conjugation, allowing transfer of other plasmids to this group. They are not transmissible to the Pseudomonadaceae. P-group plasmids are transmissible to both taxa. Plasmids of groups N and W are transmissible to Proteus (transfer to Pseudomonas was not tested because of lack of suitable markers). %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-70-3-453