psih:LOY51_02845 K11903 type VI secretion system secreted protein Hcp | (GenBank) Hcp family type VI secretion system effector psih:LOY51_02755 K11900 type VI secretion system protein ImpC | (GenBank) tssC; type VI secretion system contractile sheath large subunit psih:LOY51_02750 K11901 type VI secretion system protein ImpB | (GenBank) tssB; type VI secretion system contractile sheath small subunit