[Comparative genetics of yeasts. XXII. The determination of alpha-methylglucoside fermentation by the maltose genes MAL6c2 and malx in the offspring of Saccharomyces cerevisiae N. C. Y. C. 74 strain].

In offsprings of N.C.Y.C. 74, maltose regulatory constitutive MAL6C2 mutation controls alpha-methylglucoside (alpha-mgl) fermentation in the presence of MALx. MAL6C2 MALx system described by ten Berge et al, is analogous in function (polymeric interaction) to, at least, one MGLa gene from the system of complementary alpha-mgl genes MGLa MGLb MGLc identified by ten Berge. Suppressor malx mutation inhibits both the maltose and alpha-mgl activity of MAL6C2 allele. A brief review on participation of maltose genes in alpha-mgl fermentation is presented.