PART I: GENERAL ASPECTS 1: Amino Acids as Multifunctional Molecules, J P F D'Mello 2: Amino Acid Analysis of Feeds, J Fontaine, Feed Additives Division, Degussa AG, Applied Technology, Hanau, Germany 3: Absorption of Amino Acids and Peptides, C R Krehbiel, Oklahoma State University, USA and J C Matthews, University of Kentucky, Lexington, USA 4: An Outline of Pathways in Amino Acid Metabolism, J P F D'Mello 5: Amino Acid Metabolism in Animals: An Overview, B J Bequette, University of Maryland, USA 6: Essential to Non-Essential Amino Acid Ratios, J Heger, Biofaktory Praha s r o, Czech Republic 7: Adverse Effects of Amino Acids, J P F D'Mello PART II: PIGS 8: Methionine-Cystine Relationships in Pig Nutrition, A J Lewis, University of Nebraska, Lincoln, USA 9: Ideal Dietary Amino Acid Profiles for Pigs, S Boisen, Department of Animal Nutrition and Physiology, Research Centre Foulum, Tjele, Denmark 10: Digestible Amino Acids in Diet Formulation for Pigs, R Mosenthin, Institute of Animal Nutrition, Hohenheim University, Stuttgart, Germany and M Rademacher, Feed Additives Division, Degussa AG, Applied Technology, Hanau, Germany 11: Modelling Amino Acid Metabolism and the Estimation of Amino Acid Requirements, P J Moughan and M F Fuller, Institute of Food, Nutrition and Human Health, Massey University, New Zealand 12: Amino Acid Utilization for Reproduction in Sows, S W Kim, Texas Tech University, Lubbock TX , USA and R A Easter, College of Agricultural, Consumer and Environmental Sciences, University of Illinois, Urbana IL, USA PART III: POULTRY 13: Ideal Amino Acid Patterns for Broiler Chicks, D H Baker, University of Illinois, Urbana, IL, USA 14: Responses of Growing Poultry to Amino Acids, J P F D'Mello PART IV: RUMINANTS 15: Metabolism and De Novo Synthesis of Amino Acids by Rumen Microbes, C Atasoglu and R J Wallace, Rowett Research Institute, Aberdeen, UK 16: Modelling Amino Acid Metabolism in Ruminants, R L Baldwin, C C Calvert, P H Robinson and H A Johnson, Department of Animal Science, University of California, Davis, USA 17: Amino Acid Utilization for Wool Production, S M Liu and D G Masters, CSIRO Livestock Industries, Wembley WA, Australia 18: Amino Acid Utilization by Growing and Finishing Ruminants, E C Titgemeyer, Department of Animal Sciences and Industry, Kansas State University, Manhattan, USA 19: Mammary Uptake and Metabolism of Amino Acids by Lactating Ruminants, B J Bequette, M D Hanigan, Dairy Research Group, Purina Mills Inc., Missouri, USA and H Lapierre, Dairy and Swine R&D Research Centre, Quebec, Canada 20: Effects of Amino Acids on Milk Production, D G Chamberlain and J-M Yeo, Hannah Research Institute, Ayr, Scotland, UK 21: Predicting Dietary Amino Acid Adequacy for Ruminants, D G Fox and L O Tedeschi, Cornell University, Ithaca, NY, USA PART V: OTHER ANIMALS 22: Canine and Feline Amino Acid Requirements for Different Physiological Functions, W H Hendriks, Institute of Food, Nutrition and Human Health, Massey University, New Zealand 23: Amino Acid Requirements of Finfish and Crustaceans, R P Wilson, Mississippi State University, USA PART VI: APPLICATIONS AND PERSPECTIVES 24: Crystalline Amino Acids and Nitrogen Emission, M V A Verstegen, Animal Nutrition Group, Wageningen University and Research Centre, The Netherlands and A W Jongbloed, ID-TNO Animal Nutrition, Lelystad, The Netherlands 25: Economic Assessment of Amino Acid Responses in Growing Poultry, M Pack, D Hoehler and A Lemme, Degussa AG, Applied Technology Feed Additives, Hanau, Germany 26: Conclusions.