Fig. 3From: Biosynthesis of melatonin from l-tryptophan by an engineered microbial cell factoryCloning and expression analysis of the four synthetic genes in B7992. A PCR-amplified fragments using the plasmid extracted from BL7992 as template. M, DL15,000 marker. B The qPCR analysis using cDNA of BL7992 as template. The gene expression is relative to 16S rRNA expressionBack to article page