NAD biosynthesis, tryptophan => quinolinate => NAD
Brite
Enzymes [BR:lsax01000]
1. Oxidoreductases
1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)
1.13.11 With incorporation of two atoms of oxygen
1.13.11.11 tryptophan 2,3-dioxygenase
138969176