Term Name:	phosphatidylinositol-3,4-bisphosphate 4-phosphatase activity
Synonyms:	1-phosphatidyl-1D-myo-inositol-3,4-bisphosphate 4-phosphohydrolase activity, inositol polyphosphate 4-phosphatase type II activity
Definition:	Catalysis of the reaction: 1-phosphatidyl-1D-myo-inositol 3,4-bisphosphate + H2O = 1-phosphatidyl-1D-myo-inositol 3-phosphate + phosphate.
Ontology:	GO: Molecular Function [GO:0016316]    QuickGO    AmiGO