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glucanases (GB)
The enzyme or the enzyme group occurs in many plants. It must not be confused with the polysaccharide (multiple sugar) glucan, which is contained in many fungal cell walls as a structural component with a strengthening effect. In infestation of the grapes by mushrooms such as Botrytis or bunch rot, their glucans are cleaved by the glucanases. A similar effect have the chitinases against the also found in mushrooms chitin. It is therefore a certain resistance but their different extent from the respective vine is dependent. In most cases, however, glucans enter the must during fungal infestations. Here they increase the viscosity, which has a negative effect on the extract yield and stability. In the beer and winemaking are therefore off Bacteria- and mold cultures produced glucanases with the aim better degumming and filtration used. A similar effect have the pectinases, Both are among the so-called oenological enzymes,

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