This gene encodes multiple inositol polyphosphate phosphatase, an enzyme that removes 3-phosphate from inositol phosphate substrates. It is the only enzyme known to hydrolzye inositol pentakisphosphate and inositol hexakisphosphate. This enzyme also converts 2,3 bisphosphoglycerate (2,3-BPG) to 2-phosphoglycerate, an activity formerly thought to be exclusive to 2,3-BPG synthase/2-phosphatase (BPGM) in the Rapoport-Luebering shunt of the glycolytic pathway.Synonyms: 3, 4, 5)-tetrakisphosphate 3-phosphatase, 5)P(4) 3-phosphatase, Inositol (1, Ins(1, MIPP, Multiple inositol polyphosphate phosphatase 1, UNQ900/PRO1917