Biotechnology and Bioengineering · 1980 · 21 citations · 9 references
Life SciencesBiochemistryBiotechnologyBiocatalysisEnzymologyPolymer ChemistryCellulose ChemistryEnzyme ImmobilizationEnzyme StabilityEnzyme StabilizationImmobilized EnzymesPolysaccharide PropertiesCellulose-based PolymersCopolymerizationCopolymerization StrategiesGraft CopolymerizationImmobilizationImmobilization MatricesImmobilized Enzyme SystemsPolysaccharide Materials
Abstract A method of enzyme immobilization by graft copolymerization on polysaccharides is reported. Glycidylmethacrylate was used as a vinylating reagent and the reaction product with enzymes (HRP, GOD, Am, ChT) was copolymerized with different matrices (cellulose, Sepharose, Sephadex, Starch). Various factors affect the final activity of copolymers; these include the redox system, the type of support, and the quantity and type of vinyl monomer added. Using a fixed quantity of enzyme and support (3 mg enzyme, 100 mg support), the coupling efficiency varied from 2 to 50%. The most important characteristics in these immobilized systems were tested (stability in continuous washing, kinetic characteristics, storage, thermal, and lyophilization stability). Immobilized‐enzyme graft copolymers have very similar kinetic behavior to that of the free enzyme. Diffusion is not seriously limited, as shown by kinetic parameters and energy activation values, and this indicates that the immobilization reaction does not alter the enzymatic activity.
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Karel Martínek, Alexander M. Klibanov, Victor S. Goldmacher · Biochimica et Biophysica Acta (BBA) - Enzymology · 1977 · 238 citations
Analysis and control of immobilized enzyme systems
Veronika Jancsik · FEBS Letters · 1977 · 131 citations · Full text
V.P. Torchilin, V.N. Smirknov, Alexander M. Klibanov et al. · Biochimica et Biophysica Acta (BBA) - Enzymology · 1978 · 83 citations