title: Initiation of recA+-dependent recombination in Escherichia coli (lambda). I. Undamaged covalent circular lambda DNA molecules in uvrA+ recA+ lysogenic host cells are cut following superinfection with psoralen-damaged lambda phages.
mesh_terms: D003090:Coliphages / Q000187:drug effects; D004269:DNA, Bacterial / Q000096:biosynthesis; D004270:DNA, Circular / Q000235:genetics*; D004279:DNA, Viral / Q000528:radiation effects; D004926:Escherichia coli / Q000235:genetics*; D005363:Ficusin / Q000494:pharmacology; D007666:Khellin / Q000494:pharmacology; D008027:Light; D008242:Lysogeny; D011995:Recombination, Genetic
chemical_list: D004269:DNA, Bacterial; D004270:DNA, Circular; D004279:DNA, Viral; D007666:Khellin; D005363:Ficusin