title: Fertility regulation in F-like resistance transfer factors.
abstract: Mutants of the R factor R100 have been isolated that mediate high-frequency transfer of the R factor during conjugation. Complementation tests revealed two classes of mutants, operator-constitutive and repressor-negative. Some of the latter class were suppressible by amber and ochre suppressors. The results support a simple model of regulation for the control of R-factor-mediated piliation.
mesh_terms: D003227:Conjugation, Genetic; D004926:Escherichia coli / Q000254:growth & development* / Q000302:isolation & purification; D005298:Fertility; D005827:Genetics, Microbial; D008954:Models, Biological; D009154:Mutation; D014161:Transduction, Genetic