inpp4b编码肌醇聚磷酸4-磷酸酶Ⅱ型，它是磷脂酰肌醇信号传导途径中的一种酶。这种酶从3，4-二磷酸肌醇中除去肌醇环4位的磷酸基团。有有限的数据表明，人类II型酶受到选择性剪接的影响，正如已经为I型酶建立的那样。[由RefSeq提供，2008年7月]
INPP4B encodes the inositol polyphosphate 4-phosphatase type II, one of the enzymes involved in phosphatidylinositol signaling pathways. This enzyme removes the phosphate group at position 4 of the inositol ring from inositol 3,4-bisphosphate. There is limited data to suggest that the human type II enzyme is subject to alternative splicing, as has been established for the type I enzyme. [provided by RefSeq, Jul 2008]