Elsevier Inc. N-formyl-L-kynurenine ---> kynurenine Afmid 2-amino-3-carboxymuconic 6-semialdehyde ---> 2-aminomuconate 6-semialdehyde 3-hydroxyanthranilic acid ---> 2-amino-3-carboxymuconic 6-semialdehyde 3-hydroxykynurenine ---> 3-hydroxyanthranilic acid kynurenine ---> anthranilic acid 3-hydroxykynurenine ---> xanthurenic acid tryptophan ---> N-formyl-L-kynurenine Structures of KP enzymes picolinic acid quinolinic acid 2-amino-3-carboxymuconic 6-semialdehyde 3-hydroxyanthranilic acid cinnabarinic acid 3-hydroxykynurenine 3-hydroxyanthranilic acid ---> cinnabarinic acid xanthurenic acid anthranilic acid kynurenic acid kynurenine N-formyl-L-kynurenine tryptophan kynurenine ---> 3-hydroxykynurenine Kmo Kynu Ido1 Ido2 Tdo2 2-amino-3-carboxymuconic 6-semialdehyde ---> quinolinic acid quinolinic acid ---> de novo nicotinamide adenine dinucleotide biosynthetic pathway 2-aminomuconate 6-semialdehyde ---> picolinic acid de novo nicotinamide adenine dinucleotide biosynthetic pathway kynurenine aminotransferase Haao kynurenine ---> kynurenic acid Acmsd 2-aminomuconate 6-semialdehyde