Anti-cytochrome c oxidase subunit VIb polypeptide 2 (testis) antibodies enable researchers to detect and measure the cytochrome c oxidase subunit VIb polypeptide 2 (testis) antigen in biological samples. This target is a reported synonym of the COX6B2 gene, which encodes cytochrome c oxidase subunit 6B2. This protein is a known component of the cytochrome c oxidase, the last enzyme in the mitochondrial electron transport chain which drives oxidative phosphorylation. The human version of cytochrome c oxidase subunit VIb polypeptide 2 (testis) has a canonical amino acid length of 88 residues and a protein mass of 10.5 kilodaltons. It is reported to be localized in the mitochondria of cells. Other names for this target antigen include COX VIb-2, cancer/testis antigen 59, and cytochrome c oxidase subunit VIb polypeptide 2 (testis).