title: Induction of extracellular proteases by egg-white in Aspergillus nidulans.
abstract: Aspergillus nidulans when supplemented with egg-white protein (1 %) produced considerable amounts of proteases extracellularly. The order of the appearance of the proteolytic enzymes growth on untreated and heat-inactivated egg-white were studied. They showed pH optima of 5, 7.2 and 9 when assayed at 37 degrees C. It is proposed that one of the factors leading to higher cell mass of A. nidulans in the presence of egg-white is the availability of protease-catalyzed hydrolyzed products of egg-white.
mesh_terms: D001233:Aspergillus nidulans / Q000201:enzymology*; D003470:Culture Media; D004529:Egg White; D004790:Enzyme Induction; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D010447:Peptide Hydrolases / Q000096:biosynthesis* / Q000378:metabolism; D013696:Temperature
chemical_list: D003470:Culture Media; D010447:Peptide Hydrolases