1. Unité de Biochimie des Régulations Cellulaires, Institut Pasteur, 75724 Paris Cedex 15, France, Institute Cantacuzino, Bucharest, Romania, Departments of Biochemistry and Ophtalmology, University of Missouri, Columbia, Missouri 65203, USA, Max-Delbrück Biomedical Center, Berlin, Germany, Institute for Biodiagnostics, National Research Council of Canada, Winnipeg, Manitoba R3B 1Y6, Canada, Institut de Physico-Chimie, 91405 Orsay Cedex, France, Laboratoire d'Enzymologie, 91198 Gif sur Yvette, France, and...