| http://www.w3.org/ns/prov#value | - e than 2800 proteins have been identified, mainly based on sequence alignment, as members of the radical SAM enzyme superfamily.5 These enzymes catalyze a variety of reactions, such as isomerization, protein radical formation, sulfur insertion, ring formation, anaerobic oxidation, and unusual methylations, and are involved in the biosynthesis of DNA precursors, cofactors, vitamins, many types of s
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