The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 1991
Filed:
Apr. 10, 1987
Alko Ltd., Helsinki, FI;
Abstract
The objects of this invention are new Saccharomyces cerevisiae yeast strains into which .alpha.-galactosidase gene (MEL.sup.+) has been transferred by using recombinant DNA methods. Baker's and distiller's yeasts producing .alpha.-galactosidase, are utilizable in the corresponding industry, because they are able to utilize the raffinose present in molasses, which results in greater yield of yeast (or ethanol) and reduction or elimination of the costs associated with biological oxygen demand (B.O.D.) in the effluent from factories. The improved ability of brewer's yeasts to produce .alpha.-galactosidase provides a sensitive method for monitoring pasteurization of beer. The new yeast strains prepared by using recombinant DNA methods produce more .alpha.-galactosidase than naturally occurring .alpha.-galactosidase producing yeast strains. Also methods for marking yeast strains and for producing stable transformants of yeasts are presented.