ID 3.5.4.11 DE pterin deaminase. CA a 2-amino-4-hydroxypteridine + H(+) + H2O = a 2,4-dihydroxypteridine + CA NH4(+). CC -!- The animal enzyme is specific for pterin, isoxanthopterin and CC tetrahydropterin. DR P0CI72, IXPDE_UNKP ; B9J8S0, PDA_RHIR8 ; //