Fig. 1From: Biosynthesis of fraxetin from three different substrates using engineered Escherichia coliBiosynthetic pathways of fraxetin from esculetin (a) and ferulic acid (b). POMT7 is an O-methyltransferase, which converts esculetin into scopoletin. AtS8H is a scopoletin 8-hydroxylase. Os4CL catalyzes the attachment of CoA to ferulic acid. IbF6′H encodes feruloyl CoA 6′-hydroxylase (F6′H), which converts feruloyl CoA into scopoletinBack to article page