vci:O3Y_06560 K11903 type VI secretion system secreted protein Hcp | (GenBank) hcp protein vci:O3Y_13978 K11900 type VI secretion system protein ImpC | (GenBank) type VI secretion system protein ImpC vci:O3Y_13973 K11901 type VI secretion system protein ImpB | (GenBank) type VI secretion system protein ImpB