Enzymes and whole cells are able to catalyze the most complex chemical processes under the most benign experimental and environmental conditions. In this way, enzymes and cells could be excellent catalysts for a much more sustainable chemical industry. However, enzymes and cells also have some limitations for nonbiological applications: fine chemistry, food chemistry, analysis, therapeutics, and so on. Enzymes and cells may be unstable, difficult to handle under nonconventional conditions, poorly selective toward synthetic substrates, and so forth. From this point of view, the transformation—from the laboratory to industry—of chemical processes catalyzed by enzymes and cells may be one of the most complex and exciting goals in biotechnology. For many industrial applications, enzymes and cells have to be immobilized, via very simple and cost-effective protocols, in order to be re-used over very long periods of time. From this point of view, immobilization, simplicity, and stabilization have to be strongly related concepts. Over the last 30 years, a number of protocols for the immobilization of cells and enzymes have been reported in scientific literature. However, only very few protocols are simple and useful enough to greatly improve the functional properties of enzymes and cells, activity, stability, selectivity, and related properties.

On November 5-8, 1974, a Seminar on Research and De velopment of Immobilized Enzymes was held in Tokyo, Japan. The seminar was part of the United States-Japan Cooperative Science Program sponsored jointly by the National Science Foundation and the Japan Society for the Promotion of Sci ence. The purpose of the seminar was to promote the scienti fic exchange of ideas and scien~ific results of a practical nature, as well as academic advances made in both countries through discussion and exchange of ideas. The areas chosen for discussion included: fundamental research in immobilized enzymes, new techniques of enzyme purification, comparative studies on immobilization techni ques and the relative merits, chemical engineering aspects of the technology, industrial applications and reactor de sign. The discussions and exchange of ideas which took place at the seminar should promote new research and development which we hope will lead to new important advances in enzyme technology. These proceedings represent the summation of the work presented and discussed at the seminar. The editors hope the reader will find them interesting and informative. Howard H. Weeta11 Shuichi Suzuki March, 1975 v Contents Immobilization of Coenzyme B6 and Several B6 Enzymes: Application to Assay or Production of SOU,I;! Amino Acids and to Structure-Function Inter relationship Studies of B6 1 Enzymes • • • • • • • Saburo Fukui and Sei-ichiro Ikeda Enzyme Engineering Case Study: Immobilized Lactase • • • • • 17 James R. Ford and Wayne H. Pitcher, Jr.

For most of industrial applications, enzymes and cells have to be immobilized, via very simple and cost-effective protocols, in order to be re-used for very long periods of time. From this point of view, immobilization, simplicity and stabilization have to be strongly related concepts. The third edition of Immobilization of Enzymes and Cells expands upon and updates the previous editions with current, detailed protocols for immobilization. With new chapters on protocols for immobilization of enzymes and cells which may be useful to greatly improve the functional properties of enzymes and cells. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and key tips on troubleshooting and avoiding known pitfalls. Authoritative and practical, Immobilization of Enzymes and Cells, Third Edition demonstrates simple and efficient protocols for the preparation, characterization, and utilization of immobilized enzymes and cells.

In the last five years the potential value of immobilized enzymes has captured the imagination of an increasing number of scientists and engineers. The concept of being able to create an immobilized derivative of an enzyme which has long-term stability and is able to be recovered and reused is fascinating, to say the least. Since the industrial application of enzymes has been mostly in the food and microbial process industry it is not surprising that many of the applications of immobilized enzymes considered for commercial development fall within the area of this industry. It is for this reason that we organized a symposium on immobilized enzymes for the 166th National Meeting of the American Chemical Society. Appropriately, the symposium was jointly sponsored by the Division of Agricultural and Food Chemistry and the Division of Microbial Chemistry and Technology. Although there were at least half a dozen symposia at other meetings on various aspects of immobilized enzyme technology in the preceding ten months none had specifically addressed themselves to food and microbial processes and none had been held at a meeting such as the National ACS gathering, which is not only large but multidisciplinary. The enthusiastic response to this symposium prompted us, at the invita tion of Plenum Press, to publish the proceedings of this symposium.

A comprehensive resource on techniques and applications for immobilizing catalysts Catalyst Immobilization: Methods and Applications covers catalyst immobilization topics including technologies, materials, characterization, chemical activity, and recyclability. The book also presents innovative applications for supported catalysts, such as flow chemistry and machine-assisted organic synthesis. Written by an international panel of expert contributors, this book outlines the general principles of catalyst immobilization and explores different types of supports employed in catalyst heterogenization. The book?s chapters examine the immobilization of chiral organocatalysts, reactions in flow reactors, 3D printed devices for catalytic systems, and more. Catalyst Immobilization offers a modern vision and a broad and critical view of this exciting field. This important book: -Offers a guide to supported and therefore recyclable catalysts, which is one of the most important tools for developing a highly sustainable chemistry -Presents various immobilization techniques and applications -Explores new trends, such as 3D printed devices for catalytic systems -Contains information from a leading international team of authors Written for catalytic chemists, organic chemists, process engineers, biochemists, surface chemists, materials scientists, analytical chemists, Catalyst Immobilization: Methods and Applications presents the latest developments and includes a review of the innovative trends such as flow chemistry, reactions in microreactors, and beyond.

Enzymes: Novel Biotechnological Approaches for the Food Industry provides an in-depth background of the most up-to-date scientific research and information related to food biotechnology and offers a wide spectrum of biological applications. This book addresses novel biotechnological approaches for the use of enzymes in the food industry to help readers understand the potential uses of biological applications to advance research. This is an essential resource to researchers and both undergraduate and graduate students in the biotechnological industries. - Provides fundamental and rigorous scientific information on enzymes - Illustrates enzymes as tools to achieve value and quality to a product, either in vitro or in vivo - Presents the most updated knowledge in the area of food biotechnology - Demonstrates novel horizons and potential for the use of enzymes in industrial applications