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Prophenol oxidase (PPO) (EC 1.14.18.1) is isolated from pupae of blowfly (Sarcophaga bullata) and purified by employing ammonium sulfate fractionation, ion-exchange chromatography on DEAE-cellulose, and gel filtration through Sephadex G-100 column chromatography. The enzyme exists in a latent or inactive state. Cetylpyridinium chloride (CPC), a cationic detergent, is found to activate the PPO activity...
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