. "Edited: Williams, MG, 2011-08-12"^^ . "Reviewed: Wakelam, Michael, 2012-05-14"^^ . "Authored: Williams, MG, 2011-10-18"^^ . "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)."^^ . . . . . . . . "PI(3,4)P2 is dephosphorylated to PI3P by INPP4A/B at the plasma membrane"^^ . "3.1.3.66"^^ . . . . .