1. Proteines et Cancer, URA−CNRS 1924, Faculté de Pharmacie, 27 Boulevard Jean Moulin, F-13385 Marseille Cedex 5, France, Laboratory of Chemical and Biological Dynamics, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium, and Kettering-Meyer Laboratory, Southern Research Institute, P.O. Box 55305, Birmingham, Alabama