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Polyphenol oxidase is an enzyme found throughout the plant and animal kingdoms, [31] including most fruits and vegetables. [32] PPO has importance to the food industry because it catalyzes enzymatic browning when tissue is damaged from bruising, compression or indentations, making the produce less marketable and causing economic loss.
It begins with the oxidation of phenols by polyphenol oxidase into quinones, [4] whose strong electrophilic state causes high susceptibility to a nucleophilic attack from other proteins. [4] These quinones are then polymerized in a series of reactions, eventually resulting in the formation of brown pigments on the surface of the food. [5]
The glycosylated form develops from glucosyltransferase activity and increases the solubility of polyphenols. [47] Polyphenol oxidase (PPO) is an enzyme that catalyses the oxidation of o-diphenols to produce o-quinones. It is the rapid polymerisation of o-quinones to produce black, brown or red polyphenolic pigments that causes fruit browning ...
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Polyphenols in plant-based foods may trigger gastrointestinal hormones that could help reduce a person's risk for both obesity and type 2 diabetes, new research indicates.
The main source of polyphenols is dietary, since they are found in a wide array of phytochemical-bearing foods.For example, honey; most legumes; fruits such as apples, blackberries, blueberries, cantaloupe, pomegranate, cherries, cranberries, grapes, pears, plums, raspberries, aronia berries, and strawberries (berries in general have high polyphenol content [5]) and vegetables such as broccoli ...
An oxidative enzyme is an enzyme that catalyses an oxidation reaction. Two most common types of oxidative enzymes are peroxidases, which use hydrogen peroxide, and oxidases, which use molecular oxygen. [1] [2] They increase the rate at which ATP is produced aerobically. Oxidative enzymes are responsible for the browning of fruits like apples.
These high-fiber foods are delicious and expert-approved. Incorporate these picks into your diet for a hefty dose the many benefits fiber promises. 20 expert-approved high-fiber foods to keep you ...