vpl:SA104470976_01173 K11903 type VI secretion system secreted protein Hcp | (GenBank) hcpA_1; Hemolysin co-regulated protein vpl:SA104470976_02986 K11900 type VI secretion system protein ImpC | (GenBank) type VI secretion system protein ImpC vpl:SA104470976_02985 K11901 type VI secretion system protein ImpB | (GenBank) type VI secretion system protein ImpB