Riboflavin biosynthesis, plants and bacteria, GTP => riboflavin/FMN/FAD
Brite
Enzymatic reactions [BR:br08201]
1. Oxidoreductase reactions
1.1 Acting on the CH-OH group of donors
1.1.1 With NAD+ or NADP+ as acceptor
1.1.1.193
R03458 5-Amino-6-(5'-phospho-D-ribitylamino)uracil + NADP+ <=> 5-Amino-6-(5'-phosphoribosylamino)uracil + NADPH + H+