PI(3,4)P2 is dephosphorylated to PI3P by INPP4A/B at the plasma membrane At the plasma membrane, type I and type II inositol-3,4-bisphosphate 4-phosphatase (INPP4A) (Norris et al. 1995, Ivetac et al. 2005) and (INPP4B) (Norris et al. 1997) dephosphorylate phosphatidylinositol 3,4-bisphosphate (PI(3,4)P2) to phosphatidylinositol 3-phosphate (PI3P). Authored: Williams, MG, 2011-10-18 EC Number: 3.1.3.66 Edited: Williams, MG, 2011-08-12 Pubmed15716355 Pubmed7608176 Pubmed9295334 Reactome Database ID Release 431676164 Reactome, http://www.reactome.org ReactomeREACT_121165 Reviewed: Wakelam, Michael, 2012-05-14