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Protein & Peptide Letters

Editor-in-Chief

ISSN (Print): 0929-8665
ISSN (Online): 1875-5305

Kinetic and Thermodynamic Properties of an Immobilized Glucoamylase from a Mesophilic Fungus, Arachniotus citrinus

Author(s): Raheela Perveen, Muhammad Hamid Rashid, Muhammad Saleem, Ahmad Mukhtar Khalid and Muhammad Ibrahim Rajoka

Volume 13, Issue 7, 2006

Page: [665 - 671] Pages: 7

DOI: 10.2174/092986606777790539

Price: $65

Abstract

Purified glucoamylase from Arachniotus citrinus was immobilized on polyacrylamide gel with 70% yield of immobilization. The immobilization improved the pH optima, temperature optima, values of Km, Vmax, and activation energy. Irreversible thermal denaturation studies of soluble and immobilized glucoamylase indicated that immobilization decreased the entropy and enthalpy of deactivation by magnitudes and made the immobilized glucoamylase thermodynamically more stable.

Keywords: Glucoamylase, enthalpy, entropy, thermodynamics, Arachniotus citrinus


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