title: Isolation and characterisation of Hfr strains from a recombination-deficient strain of Escherichia coli.
mesh_terms: D000483:Alleles; D002869:Chromosome Aberrations; D003090:Coliphages; D003433:Crosses, Genetic; D004926:Escherichia coli / Q000302:isolation & purification*; D005298:Fertility; D008040:Genetic Linkage; D005827:Genetics, Microbial; D011995:Recombination, Genetic; D013045:Species Specificity; D013997:Time Factors