Research on evaluation index of autolytic ability in brewing yeast

Cell protein was hydrolyzed if brewing yeast autolyzed,and the compositions of hydrolysate such as α-amino nitrogen,amino acids and total nitrogen were different with the different type of yeast,but the rate of non-α-amino nitrogen to α-amino nitrogen in the autolysates was from 2.24 to 7.91. Ideally the rate was 7.91 which shew non-autolysis of yeast. The less was the rate,the more was autolysis of yeast. When yeast autolyzed completely,the rate was near to 2.24.