Purity ~95% (SDS-PAGE). PTPMT1 (protein tyrosine phosphatase mitochondrial 1), also known as MOSP or PLIP (phosphoinositide lipid phosphatase) and previously known as DuSP23, is a widely expressed PTP membrane protein with high expression levels in pancreatic beta cells. This protein exclusively localizes to the matrix face of the inner membrane of the mitochondrion. It is responsible for dephosphorylating mitochondrial proteins and therefore plays a significant role in the production of ATP and secretion of insulin. For its substrate, PTPMT1 displays a specific preference for the lipid signaling molecule phosphatidylinositol 5-phosphate. Source: Recombinant protein corresponding to aa28-201 of human PTPMT1, fused to His-tag at N-terminal expressed in E. coli. Molecular Weight: ~22.6kD AA