Abstract
Immobilization of pectinase fromS. rolfsii was studied on different matrices of which Amberlite XAD-7 showed maximum adsorption and expression of the enzyme. The most active preparation was obtained when XAD-7 was activated with 2% glutaraldehyde and 1.7 μkat of enzyme per g resin was used for immobilization at pH 5.5 and 28°C. Optimum pH and temperature of theS. rolfsii pectinase remain unaltered, 3.5 and 55°C, respectively, after immobilization. However, the apparentKM value of the enzyme decreased from 1.75 g/L for soluble enzyme preparation to 1.4 g/L for immobilized enzyme preparation. Both soluble and immobilized enzyme preparations were most stable at pH 4.0. The immobilized enzyme preparation was more stable than the soluble enzyme.
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