label: inositol-1,3,4-trisphosphate 1-phosphatase activity
label_lc: inositol-1,3,4-trisphosphate 1-phosphatase activity
description: "Catalysis of the reaction: D-myo-inositol 1,3,4-trisphosphate + H2O = myo-inositol 3,4-bisphosphate + phosphate."