1 Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, UK.
2 Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, UK.
3 Architecture et Fonction des Macromolécules Biologiques, Centre National de la Recherche Scientifique (CNRS), Aix-Marseille University, Marseille, France.
4 INRA, USC 1408 AFMB, Marseille, France.
5 Department of Biochemistry, University of Cambridge, Cambridge, UK.
6 School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia.
7 Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.
8 Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, UK. harry.gilbert@ncl.ac.uk.