RT Journal Article SR Electronic(1) A1 Krüger, D. H. A1 Gola, G. A1 Weisshuhn, Ilona A1 Hansen, SigridYR 1978 T1 The ocr Gene Function of Bacterial Viruses T3 and T7 Prevents Host-controlled Modification JF Journal of General Virology, VO 41 IS 1 SP 189 OP 192 DO https://doi.org/10.1099/0022-1317-41-1-189 PB Microbiology Society, SN 1465-2099, AB SUMMARY On pre-infection of the host Escherichia coli B with u.v.-inactivated T3 or T7 phage able to express their early genes (like 0·3), B-specific modification of super-infecting, successfully multiplying viruses does not take place. The ocr gene function (gene 0·3) of T3 and T7 not only prevents host-specific DNA restriction but also modification, probably by inhibiting the same late step in the interaction between the restriction enzyme and DNA., UL https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-41-1-189