SACCHAROMYCES CEREVISIAE STRAINS EXPRESSING GLUCOAMYLASE ENZYMES AND EXOGENOUS XYLANASE AND THEIR USE IN THE PRODUCTION OF BIOETHANOL

摘要

The present invention relates to strains of saccharomyces cerevisiae yeast that are genetically modified so as to co-express a gene coding a glucoamylase of fungal origin, a gene coding a glucoamylase of saccharomyces cerevisiae var. diastaticus, and a gene coding a xylanase of fungal origin. The production yield of bioethanol through these strains is greater than that of strains that are otherwise identical but that do not comprise the gene coding the xylanase of fungal origin. The present invention also relates to a method for obtaining these yeasts, as well as the use of these yeasts in the production of bioethanol.