Alkaline protease that allows assimilation of proteinaceous substrates. Acts as a significant virulence factor in invasive aspergillosis. Required for regular sporulation. Hydrolysis of proteins with broad specificity, and of Bz-Arg-OEt > Ac-Tyr-OEt. Does not hydrolyze peptide amides. Acts as a major allergen in patients suffering from extrinsic bronchial asthma. Binds to IgE. Belongs to the peptidase S8 family.