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Was phenylthiourea a competitive inhibitor or a noncompetitive inhibitor?

User Mr Punch
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Phenoloxidase is a key enzyme of melanization catalyzing the oxidation of phenols. Phenylthiourea (PTU) is the well-known and widely used inhibitor of phenoloxidase. However, the mechanism of its action is not quite clear.

User George Bikas
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