pec:W5S_3516 K11903 type VI secretion system secreted protein Hcp | (GenBank) Hcp protein pec:W5S_0963 K11900 type VI secretion system protein ImpC | (GenBank) Type VI secretion protein, EvpB/VC_A0108 family pec:W5S_0962 K11901 type VI secretion system protein ImpB | (GenBank) Type VI secretion protein, VC_A0107 family