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Electrosynthesis provides a novel methodology to produce specific and selective chemical reaction in proteins. Thus electrooxidation of hen egg-white lysozyme (HEWL) at +1.2 V (vs sce) at a carbon anode in mildly acid buffer produces selective oxidation at methionine-105; while by increase in anodic potential, or by addition of acetonitrile co-solvent, subsequent oxidation at methionine-12 is observed...
p-Cresol, as a small-molecule model for tyrosine residues in proteins, undergoes electrooxidative nitration in the presence of a nitrogen source, for example ammonia, in mildly alkaline aqueous solution at potentials in the range 0.8 to 1.4 V (vs sce). Anodized copper is the best electrode material of those studied and nitrogen sources in the increasing order of effectiveness are amides < amines...
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