VIEW ARTICLE    DOI: 10.1094/ASBCJ-44-0161

The Use of Catabolite Derepression as a Means of Improving the Fermentation Rate of Brewing Yeast Strains. R. M. Jones, I. Russell, and G. G. Stewart, Labatt Brewing Company Limited, Production Research Department, London, Ontario, Canada N6A 4M3.. J. Am. Soc. Brew. Chem. 44:0161, 1986.

The selective isolation of spontaneously arising derepressed Saccharomyces diastaticus and S. cerevisiae strains yielded mutants capable of improved maltose utilization, ethanol production, and glucoamylase activity as compared to the wild type strains. In this manner, superior partners were derived for use in spheroplast fusion experiments with brewing yeasts. A derepressed mutant of a fusion product between an S. diastaticus diploid and a lager brewing yeast was also isolated. The mutant was found to be derepressed for both maltose and starch utilization and increased activities were obtained.

Keywords: Catabolite, Derepression, Ethanol, Fermentation, Mutant, Yeast