th th This volume comprizes articles presented at the joint IX International and 6 Euro- pean Symposium on Purine and Pyrimidine Metabolism in Man held in Gmunden, Austria, June 1 through 7, 1997. Since the first of this series of meetings was held in Israel in 1973, conventions were organized every three years in different parts of the world including the USA, Japan, and Europe. The different aspects of purine and pyrimidine metabolism bring together re- searchers working in molecular genetics, biochemical pharmacology, biochemistry, devel- opmental biology, immunology, epidemiology and the...