The acid protease in yeast Promoter JMCJ - 001 is produced by submerged fermentation of Aspergillus niger followed by purification and formulation. The enzyme catalyzes the hydrolysis of protein
under acid condition. In alcohol fermentation industry the product will
liberate more amino nitrogen, and together with beneficial components for yeast
growth in the product reduces fermentation time and improves ethanol yield,
bringing economic benefits.