Phosphotyrosine phosphatase B MKILFVCTGNTCRSPLAESIAKEVMPNHQFESRGIFAVNNQGVSNYVEDLVEEHHLAETTLSQQFTEADLKADIILTMSYSHKELIEAHFGLQNHVFTLHEYVKEAGEVIDPYGGTKEMYVHTYEELVSLILKLKDIIC 139 Dephosphorylates the phosphotyrosine-containing proteins. PTPB_STAAU ptpB Low molecular weight protein-tyrosine-phosphatase ptpB