title: Kinetics of pair formation during cell cycle of Hfr and F in Escherichia coli K-12.
abstract: Pair formation ability in mating mixture of synchronized Hfr or F- culture and asynchronous culture of appropriate partner was studied. The obtained results allow to conclude that the pair formation ability of F- cells is stable over the whole cell cycle whereas in Hfr cells is it subject to cyclic changes with maximum in the first half of the cycle.
mesh_terms: D002455:Cell Division; D003227:Conjugation, Genetic; D004926:Escherichia coli / Q000502:physiology*; D005144:F Factor; D007700:Kinetics; D011995:Recombination, Genetic