Exerts its effect at some terminal stage of cytochrome c oxidase synthesis, probably by being involved in the insertion of the copper B into subunit I. COXZ_RHOSH ctaG MSLSPHQKTAGGLVLVVAVMGAASFAAVPFYNWFCRVTGFAGTTAVATEAPAEVLDRTVKVRFDASREAGMPWEFRPLQREMKLKIGETGLAFYEAYNPTDRTVAGTASYNVTPDAAGGYFAKIACFCFTEQVLAPGERVEMPVTFYVDPAIIDDPDGRYVRQITLSYTFHETALTEEQAALAAESATDVN Cytochrome c oxidase assembly protein CtaG 191 cox11