Abstract
Bacterial dextranase has been immobilised on zirconia coated alkylamine glass through the process of glutaraldehyde coupling. The immobilised enzyme preparation exhibited 62% of the initial enzyme activity with a conjugation yield of 18 mg/g support. K m of the immobilised enzyme exhibited a decline in its value as compared to the soluble enzyme while V max remained unaltered. E a of the enzyme was decreased upon conjugation. The soluble enzyme had its optimal pH at 5.4 while the alkylamine conjugated dextranase was optimally active in the pH range 5.2–6.2. The immobilised enzyme has also been characterised through its pI by a new method. The industrial importance of this work is discussed.
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