. "At the plasma membrane, phosphatidylinositol-5-phosphate 4-kinase type-2 alpha (PIP4K2A) and beta (PIP4K2B) homodimers and heterodimers (Clarke et al. 2010) phosphorylate phosphatidylinositol 5-phosphate (PI5P) to phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2).

The following lists the above proteins with their corresponding literature references: PIP4K2A (Rameh et al. 1997, Clarke et al. 2008) and PIP4K2B (Rameh et al. 1997)."^^ . . . . . .