Fig. 4From: Biosynthesis of melatonin from l-tryptophan by an engineered microbial cell factoryTime profiles of biomass (OD600) and the melatonin and intermediates concentrations in BL7992. 5-HTP, 5-hydroxytryptophan; 5-HT, 5-hydroxytryptamine; NAS, N-acetyl-5-hydroxytryptamineBack to article page