1. Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King’s College London, London, SE1 1UL, United Kingdom
2. Malvern Panalytical Ltd, Enigma Business Park, Grovewood Road, Malvern, WR14 1XZ, United Kingdom
3. Centre for Biomolecular Spectroscopy, King’s College London, London, SE1 1UL, United Kingdom