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Laccase is produced by a number of fungal species that can infect grapes, most notably Botrytis cinerea Pers. (1794). [17] Laccase is active at wine pH and its activity is not readily suppressed by sulfur dioxide. It has been noted to cause oxidative browning in white wines and loss of colour in red wines.
Laccase EC 1.10.3.2 (urishiol oxidase), a 3-domain enzyme found in fungi and plants, which oxidizes different phenols and diamines. CueO is a laccase found in Escherichia coli that is involved in copper-resistance. [4] Ascorbate oxidase EC 1.10.3.3, a 3-domain enzyme found in higher plants.
Oxidative enzymes such as phenol oxidase and peroxidase mediate lignin degradation and humification. [47] Phenol oxidase activity is quantified by oxidation of L-3, 4-dihydoxyphenylalanine (L-DOPA), pyrogallol (1, 2, 3-trihydroxybenzene), or ABTS (2, 2’-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid).
The enzyme works by catalyzing the o-hydroxylation of monophenol molecules in which the benzene ring contains a single hydroxyl substituent to o-diphenols (phenol molecules containing two hydroxyl substituents at the 1, 2 positions, with no carbon between). [3] It can also further catalyse the oxidation of o-diphenols to produce o-quinones. [4]
Wine is one of the most popular alcoholic beverages worldwide, with people drinking it for hundreds, if not thousands, of years. Especially in light of red wine’s place in the Mediterranean diet ...
[41] [42] Though the metabolic degradation pathways are not fully understood, enzymes including phenoloxidase laccase (EC 1.10.3.2) and laccase-like enzymes are involved in the oxidation of aromatic substrates. [40] [43] [44] These exoenzymes can be potentially applied in the environmental degradation of phenolic pollutants.
This extra water adds volume and pressure, which can make it easier to have bowel movements. Lubricant laxatives : These are solutions such as mineral oil that coat and lubricate stool and intestine.
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