RT Journal Article SR Electronic(1) A1 HART, M. G.YR 1967 T1 The Effect of Bacteriophage λ on Host Cell Reactivation in Escherichia colik12 JF Microbiology, VO 46 IS 3 SP 321 OP 327 DO https://doi.org/10.1099/00221287-46-3-321 PB Microbiology Society, SN 1465-2080, AB SUMMARY Host cell reactivation (hcr) of phage T1 by two strains of Escherichia coli k 12, Hfr c (λ +)thy – and Hfr b 1 (λ –)thy –, was studied. Strain Hfr c showed decreased ability to reactivate ultraviolet (u.v.)-irradiated phage T1, as predicted from its behaviour in mating experiments after thymine starvation. Thymine starvation of host Hfr B 1 bacteria resembled u.v. irradiation in decreasing hcr, but thymine starvation of Hfrc increased hcr, apparently as a result of λ induction. The presence of λ prophage in E. coli k 12 was found to decrease hcr., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-46-3-321