This family consists of several phage regulatory protein CII (CP76) sequences which are thought to be DNA binding proteins which are involved in the establishment of lysogeny [1].

1: Control of gene expression in the P2-related template coliphages. III. DNA sequence of the major control region of phage 186. Kalionis B, Dodd IB, Egan JB; J Mol Biol 1986;191:199-209. PMID:3806670

2: Control of gene expression in the P2-related temperate coliphage 186. VI. Sequence analysis of the early lytic region. Richardson H, Puspurs A, Egan JB; J Mol Biol 1989;206:251-255. PMID:2704042