Anti-protein tyrosine phosphatase non-receptor type 20 antibodies are used for the immunodetection of the protein encoded by the PTPN20 gene. In humans, the canonical protein has a reported length of 420 amino acid residues and a mass of 48.4 kDa. Its subcellular localization is in the nucleus and cytoplasm. Alternative splicing is reported to yield 15 different isoforms for this protein. A member of the Protein-tyrosine phosphatase protein family, it is known to be involved with protein dephosphorylation. Other names for this target antigen include PTPN20A, PTPN20B, bA142I17.1, bA42B19.1, tyrosine-protein phosphatase non-receptor type 20, and CT126. Gene orthologs have been identified in the mouse, rat, bovine and chimpanzee species.