... Richter G(2000) Biosynthesis of vitamin b2 (riboflavin) . Annu RevNutr 20, 153–167.2 Fischer M & Bacher A (2008) Biosynthesis of vita-min B2: structure and mechanism of riboflavin syn-thase. ... important set of biochemical reactions. Other cofactors, on the otherhand, perform very different chemical tasks, andcompete for the title of master of versatility, withvitamin B2 (riboflavin) -derived, ... group of a cysteine) of theisoalloxazine ring [44], or, in one case, it is bicovalentlylinked to N1 of a histidine and the thiol group of acysteine [45]. Only recently, a novel attachment of FMN...