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Polyphenol Oxidases from Wine Grapes
2017Wine is produced from grapes which contain enzymes forming unfavorable dark polymers such as melanin, oxidizing proteins, and phenols which may influence their functions. Here we focus on the class of type-3 copper proteins presenting new insights on the structure, the occurrence during the ripening process and during wine making.
Petra Fronk +2 more
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Polyphenol oxidase isoenzymes in avocado
Phytochemistry, 1976Abstract Avocado polyphenol oxidase (PPO) was precipitated mainly in the 30–90% saturated ammonium sulfate fraction. The 40–75% saturated ammonium sulfate fraction (the partially purified enzyme) had the highest specific activity in the cultivars Lerman, Horeshim and Fuerte. The PPO was active towards o -dihydroxyphenols.
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Oxidase reactions in photoredox catalysis
Chemical Society Reviews, 2021Nicholas L Reed, Tehshik P Yoon
exaly
Physicochemical Properties of Polyphenol Oxidases
2017The presence of multiple molecular forms of polyphenol oxidases (PPOs) in several plant species is very well established (Yoruk and Marshall 2003). In addition to the differences in number, the properties of PPOs within and outside a particular species also differ significantly.
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Reaction Features of Polyphenol Oxidases
2017Polyphenol oxidases (PPOs) are dinuclear copper-containing metalloproteins that are present and characterized in several higher plants (Flurkey 1989; van Gelder et al. 1997; Demeke and Morris 2002). PPOs are also known as catechol oxidase, catecholase, diphenol oxidase, o-diphenolase, phenolase, and tyrosinase (Martinez and Whitaker 1995).
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Catalytic chemistry of glucose oxidase in cancer diagnosis and treatment
Chemical Society Reviews, 2018Lian-Hua Fu, Chao Qi, Jing Lin
exaly