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  2. Catechol oxidase - Wikipedia

    en.wikipedia.org/wiki/Catechol_oxidase

    The key role of catechol oxidase in enzymatic browning makes it a common target for inhibition. While a number of inhibitory strategies exist such as high temperature treatments(70-90 °C) to eliminate catechol oxidase catalytic activity, [6] a popular strategy is decreasing the pH with citric acid. Catechol oxidase is more catalytically active ...

  3. Catechol oxidase (dimerizing) - Wikipedia

    en.wikipedia.org/wiki/Catechol_oxidase_(dimerizing)

    In enzymology, a catechol oxidase (dimerizing) (EC 1.1.3.14) is an enzyme that catalyzes the chemical reaction 4 catechol + 3 O 2 ⇌ {\displaystyle \rightleftharpoons } 2 dibenzo[1,4]dioxin-2,3-dione + 6 H 2 O

  4. Oxidative enzyme - Wikipedia

    en.wikipedia.org/wiki/Oxidative_enzyme

    When the surface of apples are exposed to the oxygen in the air, the oxidative enzymes like polyphenol oxidase and catechol oxidase oxidize the fruit (electrons are lost to the air). Such browning can be prevented by cooking the fruit or lowering the pH (which destroys, inactivates, or denatures the enzyme) or by preventing oxygen from getting ...

  5. Polyphenol oxidase - Wikipedia

    en.wikipedia.org/wiki/Polyphenol_oxidase

    Aurone synthase purified from Coreopsis grandiflora shows weak tyrosinase activity against isoliquiritigenin, but the enzyme does not react with the classic tyrosinase substrates l-tyrosine and tyramine and must therefore be classified as catechol oxidase. [49] Laccase, a multi-copper oxidase, is often considered a subclass of polyphenol ...

  6. Catechol-O-methyltransferase - Wikipedia

    en.wikipedia.org/wiki/Catechol-O-methyltransferase

    Norepinephrine degradation. Catechol-O-methyltransferase is shown in green boxes.[5] [6]Catechol-O-methyltransferase (COMT; EC 2.1.1.6) is one of several enzymes that degrade catecholamines (neurotransmitters such as dopamine, epinephrine, and norepinephrine), catecholestrogens, and various drugs and substances having a catechol structure. [7]

  7. Catechol - Wikipedia

    en.wikipedia.org/wiki/Catechol

    Catechol (/ ˈ k æ t ɪ tʃ ɒ l / or / ˈ k æ t ɪ k ɒ l /), also known as pyrocatechol or 1,2-dihydroxybenzene, is an organic compound with the molecular formula C 6 H 4 (OH) 2. It is the ortho isomer of the three isomeric benzenediols .

  8. Dihydroxybenzenes - Wikipedia

    en.wikipedia.org/wiki/Dihydroxybenzenes

    There are three structural isomers: 1,2-dihydroxybenzene (the ortho isomer) is commonly known as catechol, 1,3-dihydroxybenzene (the meta isomer) is commonly known as resorcinol, and 1,4-dihydroxybenzene (the para isomer) is commonly known as hydroquinone. [1]

  9. Catechol 1,2-dioxygenase - Wikipedia

    en.wikipedia.org/wiki/Catechol_1,2-dioxygenase

    Figure 1. The overall reaction of catechol 1,2-dioxygenase. Using a non-heme iron(III) complex, 1,2-CTD is able to oxidatively cleave catechol into cis,cis-muconic acid. More specifically, 1,2-CTD is an intradiol dioxygenase, a family of catechol dioxygenases that cleaves the bond between the phenolic hydroxyl groups of catechol using an Fe 3 ...