[Hydrolyzing ability of yeast proteases in relation to protein substrates]

The possibility of use of brewer's yeast as multienzymatic preparations for hydrolyzing of animal blood proteins was demonstrated. The kinetic characteristics of hydrolysis of blood proteins by activated brewer's yeast mass and neutral proteinase from Bacillus subtilis 102 and the activation energies were estimated. Brewer's yeast biomass may be used as a source of enzymes of broad substrate specificity and noncontiguous amino acids, in particular, isoleucine, to increase the biological efficiency of blood proteins by 15-30%.