ID 3.1.3.72 DE 5-phytase. CA 1D-myo-inositol hexakisphosphate + H2O = 1D-myo-inositol 1,2,3,4,6- CA pentakisphosphate + phosphate. CC -!- The enzyme attacks the product of the above reaction more slowly to CC yield Ins(1,2,3)P3. //