At the early endosome membrane, phosphatidylinositol 4-kinase type 2-alpha/beta (PI4K2A/B) (Balla et al. 2002) phosphorylates phosphatidylinositol (PI) to produce phosphatidylinositol 4-phosphate (PI4P).
Balla, T, Tuymetova, G, Balla, A, Barshishat, M, Geiszt, M
1-phosphatidylinositol 4-kinase activity of PI4K2A/2B [cytosol]
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