Anti-protein tyrosine phosphatase, non-receptor type 4 (megakaryocyte) antibodies enable researchers to detect and measure the protein tyrosine phosphatase, non-receptor type 4 (megakaryocyte) antigen in biological samples. This target is a reported synonym of the PTPN4 gene, which encodes protein tyrosine phosphatase non-receptor type 4. This protein is known to function in protein dephosphorylation, among other biological roles. The human version of protein tyrosine phosphatase, non-receptor type 4 (megakaryocyte) has a canonical amino acid length of 926 residues and a protein mass of 105.9 kilodaltons. It is reported to be localized in the cell membrane and cytoplasm of cells. Other names for this target antigen include MEG, PTPMEG, and PTPMEG1.