1. Department of Microbiology, University of Manitoba Winnipeg MB R3T 2N2 Canada
2. Service de Bioénergétique, URA 2096 CNRS, Département de Biologie Joliot‐Curie CEA Saclay 91191 Gif‐sur‐Yvette France
3. Departament de Biologia Estructural (IBMB‐CSIC), Parc Científic de Barcelona Josep Samitier 1‐5 08028 Barcelona Spain