Yet the consequences are unknown Bioavailability: there are four specific metabolic steps necessary to convert cyanocobalamin into one of the coenzyme forms, which is a clear metabolic disadvantage (3) Utilisation problems: certain hereditary diseases, as well as metabolic disorders, prevent the conversion of cyanocoalamin into the active B12 forms (4) Steals methyl groups: cyanocobalamin requires a methyl group to convert into methylcobalamin, which it takes from the important amino acid S-adenosylmethionine (SAM)
Rhone-Poulenc improved yield via genetic engineering P
Peptide purity above 98% and proper storage at 20C before reconstitution are critical to maintaining biological activity in experimental protocols
Cold Spring Harbor perspectives in biology, 8(8), a005926
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