Compound as reactive (1)

H₂O + D-myo-inositol (1,2,4,5,6)-pentakisphosphate → D-myo-inositol (1,2,5,6) tetrakisphosphate + phosphate

Compound as product (1)

H₂O + phytate → phosphate + D-myo-inositol (1,2,4,5,6)-pentakisphosphate

Reversible reaction (1)

D-myo-inositol (1,4,5,6)-tetrakisphosphate + ATP ↔ 2 H⁺ + D-myo-inositol (1,2,4,5,6)-pentakisphosphate + ADP