DOI: 10.1002/cbic.201200556 S-Adenosyl-Methionine-Dependent Methyltransferases : Highly Versatile Enzymes in Biocatalysis, Biosynthesis and Other Biotechnological Applications Anna-Winona Struck, Mark L. Thompson, Lu Shin Wong,* and Jason Micklefield* [a] 2642  2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim ChemBioChem 2012, 13, 2642 – 2655