The protease components of Aspergillus strains from different soy sauce were compared by active electrophoresis.Effect of activation on the expression and activity of protease components were studied.The results showed that different number of protease components could be observed from different strains,in which,Aspergillus oryzae GM had more protease components than those of the other strains.The activities of protease components could be enhanced by activation,in which part 4 of GM and AS3.324,part 1 of 3...