Anti-protein tyrosine phosphatase-like (proline instead of catalytic arginine), member b antibodies enable researchers to detect and measure the protein tyrosine phosphatase-like (proline instead of catalytic arginine), member b antigen in biological samples. This target is a reported synonym of the HACD2 gene, which encodes 3-hydroxyacyl-CoA dehydratase 2. This protein is known to function in the metabolism of lipids, among other biological roles. The human version of protein tyrosine phosphatase-like (proline instead of catalytic arginine), member b has a canonical amino acid length of 254 residues and a protein mass of 28.4 kilodaltons. It is reported to be localized in the ER of cells and widely expressed in many tissue types. Other names for this target antigen include very-long-chain (3R)-3-hydroxyacyl-CoA dehydratase 2 and protein tyrosine phosphatase-like (proline instead of catalytic arginine), member b.