Several Spanish researchers from very close fields like biochemistry, pharmacology and physiology were invited to participate in this round table (Signal transduction as pharmacological target). Chaired by Drs. J.M. Baeyens (Department of Pharmacology and Therapeutics, Universidad de Granada) and A. Zorzano (Department of Biochemistry and Molecular Biology, Universidad de Barcelona) this workshop was held in Barcelona (June 11, 1998). All presentations and discussions were edited through the monograph number 24(“Monografías Dr. Antonio Esteve”, only published in Spanish).