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. 2006 May-Jun;1(3):89–95. doi: 10.4161/psb.1.3.2640

Figure 1.

Figure 1

Tryptophan-dependent biosynthetic pathway of IAA in plants and of melatonin in mammals. The enzymes for the respective steps are: 1, Tryptophan 5-hydroxylase (EC 1.14.16.4); 2, Tryptophan decarboxylase (EC 4.1.1.28); 3, Serotonin N-acetyltransferase (EC 2.3.1.87); 4, Hydroxyindole O-methyltransferase (EC 2.1.1.4); 5, Cytochrome P450 hydroxylase (CYP79 family); 6, Tryptophan aminotransferase (EC 2.6.1.27); 7, Myrosinase (EC 3.2.1.147); 8, Indolepyruvate decarboxylase (EC 4.1.1.74); 9, Monoamine oxidase (EC 1.4.3.4); 10, Indoleacetaldehyde oxidase (EC 1.2.3.7) and 11, Nitrilase (EC 3.5.5.1).