| gptkbp:instanceOf | gptkb:biological_pathway 
 | 
                        
                            
                                | gptkbp:dysregulationAssociatedWith | gptkb:cancer gptkb:depression
 schizophrenia
 neurodegenerative diseases
 autoimmune diseases
 
 | 
                        
                            
                                | gptkbp:enzyme | gptkb:kynureninase gptkb:indoleamine_2,3-dioxygenase
 gptkb:tryptophan_2,3-dioxygenase
 gptkb:kynurenine_3-monooxygenase
 gptkb:kynurenine_aminotransferase
 aromatic L-amino acid decarboxylase
 tryptophan hydroxylase
 
 | 
                        
                            
                                | gptkbp:involves | tryptophan 
 | 
                        
                            
                                | gptkbp:location | brain liver
 
 | 
                        
                            
                                | gptkbp:occurredIn | animals humans
 plants
 
 | 
                        
                            
                                | gptkbp:predecessor | gptkb:indole-3-acetic_acid gptkb:tryptamine
 gptkb:picolinic_acid
 gptkb:5-hydroxytryptophan
 gptkb:5-hydroxyindoleacetic_acid
 gptkb:formylkynurenine
 gptkb:indole-3-aldehyde
 gptkb:indole-3-lactic_acid
 gptkb:indole-3-propionic_acid
 gptkb:indoxyl_sulfate
 gptkb:melatonin_sulfate
 gptkb:nicotinamide_adenine_dinucleotide_(NAD+)
 gptkb:quinolinic_acid
 gptkb:serotonin_sulfate
 gptkb:skatole
 gptkb:tryptophol
 gptkb:xanthurenic_acid
 nicotinamide
 3-hydroxyanthranilic acid
 anthranilic acid
 
 | 
                        
                            
                                | gptkbp:produces | gptkb:indole gptkb:melatonin
 gptkb:kynurenine
 niacin
 serotonin
 
 | 
                        
                            
                                | gptkbp:regulates | cytokines inflammation
 cortisol
 
 | 
                        
                            
                                | gptkbp:relatedTo | kynurenine pathway serotonin biosynthesis
 indole pathway
 melatonin biosynthesis
 niacin biosynthesis
 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:IDO1 
 | 
                        
                            
                                | gptkbp:bfsLayer | 7 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Tryptophan metabolism 
 |