. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "ptpa_human"^^ . "PTPA"^^ . "Phosphotyrosyl phosphatase activator"^^ . "PP2A, subunit B', PR53 isoform"^^ . "Serine/threonine-protein phosphatase 2A regulatory subunit B'"^^ . "Serine/threonine-protein phosphatase 2A regulatory subunit 4"^^ . "PPP2R4"^^ . . . "Serine/threonine-protein phosphatase 2A activator"^^ .