Anti-B22 antibodies enable researchers to detect and measure the B22 antigen in biological samples. This target is a reported synonym of the NDUFB9 gene, which encodes NADH:ubiquinone oxidoreductase subunit B9. This protein is known to function in electron transport, among other biological roles. The human version of B22 has a canonical amino acid length of 179 residues and a protein mass of 21.8 kilodaltons. It is reported to be localized in the mitochondria of cells and widely expressed in many tissue types. Other names for this target antigen include CI-B22 and LYRM3.