GLUTAMINE, GLUTAMATE, AND GABA: METABOLIC ASPECTS - H. S. Waagepetersen, U. Sonnewald, and A. Schousboe -- SERINE, GLYCINE, AND THREONINE - T. J. de Koning, S. A. Fuchs, and L. W. J. Klomp -- HISTIDINE - P. Panula -- AROMATIC AMINO ACIDS IN THE BRAIN - M. Cansev and R. J. Wurtman -- ARGININE, CITRULLINE, AND ORNITHINE - H. Wiesinger -- BRANCHED CHAIN AMINO ACIDS (BCAAs) IN BRAIN - S. M. Hutson, A. J. Sweatt and K. F. LaNoue -- SULFUR-CONTAINING AMINO ACIDS - G. J. McBean -- TAURINE - S. S. Oja and P. Saransaari -- NEUROBIOLOGY OF D-AMINO ACIDS - E. Dumin and H. Wolosker -- AMINO ACIDS AND BRAIN VOLUME REGULATION: COTRIBUTION AND MECHANISMS - H. Pasantes-Morales -- UREA CYCLE ENZYMOPATHIES - R. Butterworth -- AMMONIA TOXICITY IN THE CENTRAL NERVOUS SYSTEM - J. Albrecht -- DISORDERS IN AMINO ACID METABOLISM - M. Yudkoff -- N-ACETYLASPARTATE AND N-ACETYLASPARTYLGLUTAMATE - M. H. Baslow -- GLUTATHIONE IN THE NERVOUS SYSTEM: ROLES IN NEURAL FUNCTION AND HEALTH AND IMPLICATIONS FOR NEUROLOGICAL DISEASE - R. Janáky, R. Cruz-Aguado, S. S. Oja, and C. A. Shaw -- LOW MOLECULAR WEIGHT PEPTIDES - K. L. Reichelt.