SEROLOGICAL INVESTIGATION OF FINING AND FLOCCULENT YEASTS

In a selection of strains of Saccharomyces cerevisiae and S. carisbergensis, no serological differences were noted between fining and non‐fining strains of the same species. Fining and flocculent properties of selected strains were modified by cultivation on various media, but there was no corresponding difference in antigenic structure. An examination of fining and non‐fining yeasts of other genera and species showed that there was no common antigen which could be associated with fining properties. It is concluded that although the action of finings shows certain resemblances to the antigen‐antibody reaction, fining properties cannot be correlated with antigenic structure. 1968 The Institute of Brewing & Distilling