English GTP cyclohydrolase I Cited by user Neurotransmitter1 on 02 Mar 2016 GTP cyclohydrolase I (GTPCH) is a member of the GTP cyclohydrolase family of enzymes.
English 6,7-dihydropteridine reductase Cited by user Neurotransmitter1 on 02 Mar 2016 The 3 substrates of this enzyme are 5,6,7,8-tetrahydropteridine, NAD+, and NADP+, whereas its 4 products are 6,7-dihydropteridine, NADH, NADPH, and H+.