103 MKLRVWHIPQVPMKPFIVEVGSVEEGVRMMDALADYDAFQYDNNIKPDYCNANGLQMFDESLTDQDLEDMELDDRWIDWYSECQCYDDPREYLESLKEETTAA Superinfection exclusion protein In the absence of gp17, P22 is sensitive to a superinfection exclusion system of the fel-2 prophage. 17 Protein gp17 VG17_BPP22