Oxidation of proteins. Quantitative conversion of cysteine residues to cysteic acid residues was achieved by adding 0.5 ml of 30% hydrogen peroxide (Wako Pure Chemicals, Osaka, Japan) to 4.5 ml of ...

These activities comprise proteases, oxidoreductases and metabolic enzymes that rely on cysteine residues for catalysis and regulation. Functional cysteine residues demonstrate heightened reactivity ...