. "At the plasma membrane, phosphatidylinositol 4-kinase type 2-alpha (PI4K2A) (Balla et al. 2002, Minogue et al. 2001) and beta (PI4K2B) (Balla et al. 2002, Wei et al. 2002) phosphorylate phosphatidylinositol (PI) to phosphatidylinositol 4-phosphate (PI4P)."^^ . . . . .