Xylanase production by Aspergillus versicolor

✍ Scribed by Eleonora Cano Carmona; Aline A. Pizzirani-Kleiner; Regina T. Rosim Monteiro; João Atilio Jorge

• Book ID: 102391697
• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 340 KB
• Volume: 37
• Category: Article
• ISSN: 0233-111X
• DOI: 10.1002/jobm.3620370602

✦ Synopsis

The xylanolytic system of Aspergillus versicolor is controlled by induction and carbon catabolite repression. Carboxymethylcellulose and wheat bran were the best inducers of xylanolytic activity. When the fungus was grown for 5 days on VOGEL'S liquid medium with wheat bran, the optimal pH and temperature for xylanase production were 6.5 and 30 "C, respectively. Optimal conditions for the xylanolytic activity assay were at pH 6.0 and 55 "C. The half-life at 60 "C of the crude enzyme was 6.5 and 21 minutes, in the absence or presence of substrate, respectively.