Anti-cytochrome b5 type B (outer mitochondrial membrane) antibodies enable researchers to detect and measure the cytochrome b5 type B (outer mitochondrial membrane) antigen in biological samples. This target is a reported synonym of the CYB5B gene, which encodes cytochrome b5 type B. This protein is known to function in the response to oxidative stress, among other biological roles. The human version of cytochrome b5 type B (outer mitochondrial membrane) has a canonical amino acid length of 150 residues and a protein mass of 16.7 kilodaltons. It is reported to be localized in the mitochondria of cells and widely expressed in many tissue types. This target antigen may also be known as cytochrome b5 type B (outer mitochondrial membrane).