The Fifth International Symposium on Human Purine and Pyrimidine Metabolism was held in San Diego, California (U. S. A. ) in July and August of 1985. Previous meetings in this series were held in Tel Aviv (Israel), Baden (Austria), Madrid (Spain) and Maastricht (The Netherlands). The proceedings of each of these meetings were published by Plenum. The next meeting will be in Japan. This Symposium differed from those that went before in that it per- mitted us to honor Dr. J. E. Seegmiller, Professor of Medicine at the University of California San Diego, for his many contributions to our...