1. Section de Bioénergétique, DBCM, URA CNRS 2096, CEA Saclay, 91191 Gif sur Yvette Cedex, France, Department of Applied Biological Chemistry, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka, 599-8531 Japan, and RIKEN Harima Institute, Spring-8 Kouto, Mikadzuki, Sayo, Hyogo 679-5148 Japan