1. Biosciences Institute, The Medical School, Newcastle University, Framlington Place, Newcastle upon Tyne NE2 4HH, UK
2. Orla Protein Technologies Ltd., Biosciences Centre, International Centre for Life, Times Square, Newcastle upon Tyne NE1 4EP, UK
3. ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 OQX, UK