Secretion of α-L-rhamnosidase by some indigenous fungal strains

摘要

Secretion of α- L-rhamnosidase [E.C.3.2.1.40] by Aspergillus fumigatus MTCC- 3376, Aspergillus flavipus MTCC-4644, Aspergillus ochraceus MTCC-4643, Aspergillus terreus MTCC-3375, Aspergillus terreus MTCC-3566, and Aspergillus foetidus MTCC-508 in the liquid culture medium are reported. The enzymatic characteristics, of α-L-rhamnosidases like, K_m for naringin, pH, and temperature optima have been determined. The K_m values are found to be in the range 0.13-0.48 mM, pH optima values are found to be between 4.0-5.5 and temperature optima values between 53-60℃.