Inositol-tetrakisphosphate 1-kinase (ITPK1) phosphorylates inositol 1,3,4-trisphosphate (I(1,3,4)P3) to inositol 1,3,4,6-tetrakisphosphate (I(1,3,4,6)P4) (Wilson & Majerus 1996, Yang & Shears 2000).
Yang, X, Shears, SB
Wilson, MP, Majerus, PW
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