DNA STRAND CODING FOR ALPHA-ACETOLACTATE DECARBOXYLASE AND YEAST TRANSFORMED WITH THE DNA STRAND

摘要

DNA strand having an ability in biotechnological production of .alpha.-acetolactate decarboxylase is disclosed. The DNA strand is characterized in that it has a nucleotide sequence coding for a polypeptide whose amino acid sequence is substantially from A to B of Fig. 1 and which has .alpha.-acetolactate decarboxcylase activity. Also disclosed is a yeast which belongs to Saccharomyces cerevisiae and which has been transformed by the DNA strand. The yeast is characterized by the fact that its .alpha.-acetolactate producing ability is reduced, and will thus produce an, alcoholic liquor such as beer which contains no or little diacetyls which have come from their precursor, namely .alpha.-acetolactate.