1D-myo-inositol 1,2,3,4,5-pentakisphosphate + H2O => 1D-myo-inositol 2,3,4,5-tetrakisphosphate + phosphate
1d-myo-inositol 1,2,3,4,5-pentakisphosphate + h2o => 1d-myo-inositol 2,3,4,5-tetrakisphosphate + phosphate