GTP cyclohydrolase II
In enzymology, a GTP cyclohydrolase II (EC3.5.4.25) is an enzyme that catalyzes the chemical reaction
Thus, the two substrates of this enzyme are GTP and H2O, whereas its 3 products are formate, 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine, and diphosphate.