protein-tyrosine phosphatase of regenerating liver 2 protein tyrosine phosphatase type IVA 2 protein tyrosine phosphatase IVA PRL-2 protein tyrosine phosphatase type IVA, member 2 protein tyrosine phosphatase IVA2 ptp-IV1b HU-PP-1 PTPCAAX2 PRL2 phosphatase of regenerating liver 2 HH7-2 PTP4A ptp-IV1a HH13 PTP(CAAXII) OV-1