Er polyphenoloxidase den samme som catecholoxidase?
ingen
Catechol oxidase
Polyphenoloxidaser er en familie af di-kobbermetalloenzymer, der omfatter tyrosinase og catecholoxidase. I planter kan begge enzymer katalysere oxidationen af ortho-diphenolsubstrater til deres tilsvarende ortho-chinoner. Den væsentligste forskel mellem de to beslægtede enzymer er, at tyrosinase kan katalysere hydroxyleringen af monophenoler til diphenoler (monophenolaseaktivitet) samt oxidationen af o-diphenol til o-quinon (diphenolaseaktivitet), mens catecholoxidase kun har diphenolaseaktivitet.
no
Catechol oxidase
Polyphenol oxidases are a family of di-copper metalloenzymes that include tyrosinase and catechol oxidase. In plants, both enzymes can catalyze the oxidation of ortho-diphenols substrates into their corresponding ortho-quinones. The key difference between the two related enzymes is that tyrosinase can catalyze the hydroxylation of monophenols to diphenols (monophenolase activity) as well as the oxidation of the o-diphenol to the o-quinone (diphenolase activity) whereas catechol oxidase only possesses diphenolase activity.
Catechol oxidase