1. Planetary Science Section 3225, MS:183-301, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099, USA
2. Bioénergétique et Ingénierie des Protéines (UMR7281), CNRS/AMU, FR3479, Marseille, France
3. Institute for Genomic Biology, University of Illinois, Urbana-Champaign, IL 61801, USA