Exalase

CBS Customized Brewing Solutions Exalase is produced by fermentation of a selected strain of Bacillus subtilis and contains alpha-acetolactate decarboxylase activity. In classical lager fermentations without the use of Exalase, alpha-acetolactate is slowly converted to diacetyl by rising the temperature at the end of main fermentation and diacetyl is reduced by yeast to acetoin during the maturation period. Exalase can be used to catalyze the decarboxylation of alpha-acetolactate directly to acetoin since the beginning of excretion of alpha-acetolactate by yeast. The maturation period could be eliminated as far as diacetyl is concerned.