harr:HV822_00475 K11903 type VI secretion system secreted protein Hcp | (GenBank) Hcp family type VI secretion system effector harr:HV822_16465 K11900 type VI secretion system protein ImpC | (GenBank) tssC; type VI secretion system contractile sheath large subunit harr:HV822_16470 K11901 type VI secretion system protein ImpB | (GenBank) tssB; type VI secretion system contractile sheath small subunit