Immunogen sequence: PVLRNITNSQ APDGRRKSEA GSGAASSSGE DKENDGFVFK MPWKPTHPSS THALAEWASR REAFAQRPSS APDLMCLSPD RK. Tyrosine protein phosphatase which functions as a dosage-dependent inducer of mitotic progression. Required for G2/M phases of the cell cycle