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- Publisher
- Wiley
- Copyright
- Copyright © 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
- ISSN
- 1615-9306
- eISSN
- 1615-9314
- DOI
- 10.1002/jssc.200401800
- Publisher site
- See Article on Publisher Site
Abstract
Monolithic Convective Interaction Media (CIM) have been activated with epoxide and imidazole carbamate functionalities and used as supports for covalent immobilization of protein A, deoxyribonuclease I, and trypsin. The efficiency of immobilization for these proteins was determined from the amount of bound IgG, degradation of DNA, and hydrolysis of Nα‐benzoyl‐L‐arginine ethyl ester, respectively. The respective biological activities of trypsin and the binding capacity of protein A immobilized via imidazole carbamate groups were 11.45 and 2.25 times higher than those obtained for epoxide matrix while they were practically equal for deoxyribonuclease I. The kinetics of immobilization was studied in detail for trypsin under dynamic conditions and revealed that the enzyme immobilized via imidazole carbamate groups already reached its highest activity in 5 min. In contrast, a much longer time was required for immobilization via epoxy groups.
Journal
Journal of Separation Science – Wiley
Published: Jul 1, 2004