This book is addressed to both new and experienced workers interested in the properties of enzymes or using enzymes as gene markers in areas such as biochemi stry, clinical pathology, zoology, botany, systematics, ecology, population genetics or natural resources management. The first chapter introduces into the classification, structure and size of enzymes and isozymes. The second chapter provides protocols to extract (iso)enzymes from microbial, plant, animal and human tissue and cells-respectively. Methods to extract enzymes from cell-organelles of plant and animal tissues are also...