Genetically stable allopolyploid somatic fusion product useful in the production of fuel alcohols
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United States of America Patent
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Sep 20, 1988
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Jul 14, 1986
filing date -
Sep 14, 1983
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Abstract
The present invention relates to a stable, allopolyploid, somatic fusion product useful in the fermentation arts and especially in the production of fuel alcohols. More particularly, the present invention relates to a novel allopolyploid yeast strain, Saccharomyces diastaticus NCYC 1460, which is the product of the spheroplast fusion of: (a) a hybrid, diploid strain of Sacch. diastaticus; and (b) a fusion partner which is a polyploid brewing yeast strain of the species Saccharomyces uvarum (carlsbergensis). The fusion product of the present invention is capable of an enhanced rate of fermentation and a generally higher degree of final attenuation than is typical of either of the fusion partners. Moreover the fusion product also evidences enhanced osmo- and thermo-tolerances and its multiple, non-allelic DEX gene complement renders the organism well suited to the fermentation of substrates containing dextrins and oligosaccharides.
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