label: inositol hexakisphosphate 4-kinase activity
label_lc: inositol hexakisphosphate 4-kinase activity
description: "Catalysis of the reaction: ATP + 1D-myo-inositol hexakisphosphate = ADP + 4-diphospho-1D-myo-inositol (1,2,3,5,6)pentakisphosphate."