These was received plasmolysates from sedimented wine yeast arid was compared theirs specificity of stimulating process alcoholic fermentation with applicable autolysates so far, preparates of celluar walls of yeast and business preparates like: Fermint, Biointec i Atifferm. The contents of α-aminoacid nitrogen and dry substance were the parameters characterising these preparates. Stimulating activity was checked in probes of apply must fermentation.