gamma VGAM_LAMBD gam Host-nuclease inhibitor protein gam 138 Gene GAM protein inhibits the host recBC-coded nuclease and thus promotes the late, rolling-circle mode of lambda DNA replication. MDINTETEIKQKHSLTPFPVFLISPAFRGRYFHSYFRSSAMNAYYIQDRLEAQSWARHYQQLAREEKEAELADDMEKGLPQHLFESLCIDHLQRHGASKKSITRAFDDDVEFQERMAEHIRYMVETIAHHQVDIDSEV