Preparation and properties of co-reticulated invertase supported by an ultrafiltration membrane

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Abstract
Yeast invertase was co-reticulated with glutaraldehyde to bovine serum albumin to give a soluble bound enzyme that was immobilized as a tightly adhering layer on the active surface of an ultrafiltration membrane. The Michaelis constant and stability of this immobilized-enzyme system are compared with those of the enzyme either in the native form or immobilized as a dynamically formed gel layer on an ultrafiltration membrane, as previously described by us [Drioli, Gianfreda, Palescandolo & Scardi (1975) Biotechnol, Bioeng, 17, 1365-1367].

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