1.1.1.2	alcohol dehydrogenase (NADP+)	L-tryptophan degradation X (mammalian, via tryptamine)	-	
1.1.1.191	indole-3-acetaldehyde reductase (NADPH)	L-tryptophan degradation X (mammalian, via tryptamine)	-	
1.2.1.3	aldehyde dehydrogenase (NAD+)	L-tryptophan degradation X (mammalian, via tryptamine)	-	
1.4.3.4	monoamine oxidase	L-tryptophan degradation X (mammalian, via tryptamine)	-	
4.1.1.28	aromatic-L-amino-acid decarboxylase	L-tryptophan degradation X (mammalian, via tryptamine)	-	
4.1.1.105	L-tryptophan decarboxylase	L-tryptophan degradation X (mammalian, via tryptamine)	-