The enzymes implicated in ethyl acetate synthesis and the catabolism of ethanol by Kluyveromyces fragilis were investigated under varying growth conditions. The culture was grown continuously to D = 0.25 h -i on diluted whey permeate. The results showed that ethyl acetate synthesis by Kluyveromyces fragilis is catalysed by both an esterase and an alcohol acetyltransferase. The esterase is a constitutive enzyme, while alcohol acetyltransferase is inducible. The catabolism of ethanol by Kluyveromyces fragilis resulted in production of ethyl acetate, acetate and acetaldehyde. The glyoxylic shunt is totally inactive in these conditions. The production of acetaldehyde is only governed by an alcohol dehydrogenase.
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Kallel-Mhiri et al. (1993) studied this question.
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