Abstract

Mushroom tyrosinase catalyses the oxidation of Fe(II) to Fe(III). Both the newly-discovered ferroxidase and the well-characterized diphenol oxidase activities of tyrosinase exhibit inhibition by cyanide and both activities co-purify during two preparation steps. The characteristics of tyrosinase-catalysed Fe(II) oxidation are compared with those of other ferroxidases.

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