Tae Kwon Do may be the most maligned of arts. You are asked to believe that it was created for the destruction of one man by another. You hear high-pitched incantations and are led to believe that somewhere within these sounds lies the mystique of Tae Kwon Do. This is show business.
A yeast autolysate or yeast autolysate extract is made by fermentation of yeast to a concentration level where the yeast dies and the cells walls break. The proteases from the yeast itself start the digestion of the proteins and split them into peptides and amino acids. The insoluble portion is removed.
Extracting fermentable sugars from grains are critical to the success of yeast fermentation, and production of alcohol could not occur without the work of amylase enzymes to break down starch into simple sugars that are usable by yeast. Also, many steps of the metabolic pathways used by yeast are enzyme-dependent.