rexB 144 Protein rexB REXB_LAMBD The rex gene inhibits the growth of unrelated coliphages, including T4rII, T5lr, T1, and some mutants of T7, P22, phi-80, and lambda. It controls the activity of gene S and may inhibit the establishment of lysogeny by the repressor protein. MRNRIMPGVYIVIIPYVIVSICYLLFRHYIPGVSFSAHRDGLGATLSSYAGTMIAILIAALTFLIGSRTRRLAKIREYGYMTSVVIVYALSFVELGALFFCGLLLLSSISGYMIPTIAIGIASASFIHICILVFQLYNLTREQE