Biochemistry: The ylide has landed.

Landgraf, Bradley J; Booker, Squire J · Nature · 2013

basic_science · Level V

Where this comes from

Abstract

The enzyme co-substrate S-adenosylmethionine exhibits two general modes of reactivity at its sulphur center: methyl group donation and radical generation. The discovery of a novel metabolite reveals a third way in which this amazingly versatile molecule can react.

Medical subject headings