
Full text loading...
SUMMARY
Two strains of Escherichia coli K12 carried R factors associated with the hsII host specificity determinants although they were apparently fi +, while all other R factors carrying this host specificity have been found to be fi − When these two strains were used as donors of drug resistance, separation of two R factors from each strain was observed. The separated R factors were tested for fi character, and it was found that in both cases the original strains carried an fi+ and an fi − R factor, and it was the fi − R factor which carried the hsII determinants.
Article metrics loading...
Full text loading...
References
Data & Media loading...