Author: "Ivanitsa V" / Topic: nitrogen - Searchworks@Jio Institute Digital Library Search Results

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Author: Ivanitsa VA, Al'-Nuri MA, and Egorov NS
Subjects: Chromatography, Gel, Culture Media metabolism, Electrophoresis, Polyacrylamide Gel, Enzyme Induction, Isoelectric Focusing, Peptide Hydrolases analysis, Aspergillus enzymology, Carbon metabolism, Nitrogen metabolism, Peptide Hydrolases biosynthesis, Sulfur metabolism
Published: 1982

Author: Ivanitsa VA, Egorov NS, and Al'-Nuri MA
Subjects: Culture Media, Dose-Response Relationship, Drug, Enzyme Activation drug effects, Amino Acids metabolism, Aspergillus enzymology, Nitrogen metabolism, Peptide Hydrolases biosynthesis
Abstract: Aspergillus candidus produced an exocellular protease at a high rate in the absence of nitrogen sources. Nineteen amino acids were added separately as sole nitrogen sources to the medium to study their effect on biosynthesis of exoproteases. All the amino acids were found to repress the biosynthesis, arginine, histidine, lysine and ornithine being most effective among them. Repression of the biosynthesis of exoproteases in the presence of amino acids added as sole nitrogen sources is presumed to be accomplished by ammonium ions which are formed in the course of utilization of amino acids. The level of repression is proportional to the concentration of an amino acid in the medium. Amino acids have no effect on the activity of exocellular proteases synthesized by Aspergillus candidus.
Published: 1978

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