Advances in Biochemical Engineering, Volume 10 by Wayne H. Pitcher Jr. (auth.)

By Wayne H. Pitcher Jr. (auth.)

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Scldesselman, J. : Anal. Biochem. 80, 224 (1977) 37. Duggleby, R. , Morrison, J. : Biochim. Biophys. Acta 481,297 (1977) 38. Satterfield, C. : Mass Transfer in Heterogeneous Catalysis. Cambridge, Massachusetts: MIT Press 1970 39. Blaedel,W. , Kissel, T. , Boguslaski, R. : Anal. Chem. 44, 2030 (1972) 40. Fink, D. , Na, T. , Schultz, J. : Biotechnol. Bioeng. 15,879 (1973) 41. : Chem. Eng. Sci. 28, 1773 (1973) 42. : Biochem. Biophys. Res. Commun. 45, 615 (1971) 43. , Laidler, K. : Biochim. Biophys.

However, the heterogeneous distribution o f substrate and product within the domain of enzyme particles is an important consideration in most circumstances. Covalent binding o f hexokinase and glucose-6-phosphate dehydrogenase to either sepharose or acrylic acid-acrylamide copolymers has confirmed the increased efficiency of such a spatially concentrated enzyme system over the equivalent homogeneous system [5]. Taking the rate o f production o f NADPH (Fig. 3) in the solution system as reference a 1 0 0 - 1 4 0 % increase in the rate o f NADPH production by the matrix bound enzymes was recorded.

27 28 34 45 47 47 1 Introduction A wide diversity of immobilized multienzyme systems are now available if the widest interpretation of this concept is applied. The ingenuity of the research worker is boundless in the manner in which such enzymes may be presented. For example the following possibilities are available for cellular based systems: (i) The whole cell either in the form of a microbial film or in the less restricted flocculated form where the cell is still capable of respiration and cell reproduction.

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