sieB git Has a role in the prevention of superinfection by phages that are insensitive to repression. Superinfection exclusion protein B 192 SIEB_BPP22 MNNSWWQELMRFFLQGMTLKQLIHMLIILIVLIIVMPVSVKEWINLHNPEILPHYWMYYILLFCVSYVLNGVVNSVYHAVTERIEASTAQRRKDREEKVVRDLFDSLTLGERAYLAFAVAANNQLKTEKGSPEAISLLKKGIITRLPSAIGYPDIDRFIIPEKYFNECYMRFAGKSDILMNELIVQDEQLKK