1. EMBL Australia Node for Single Molecule Science, School of Medical Sciences, The University of New South Wales, Sydney 2052, Australia
2. Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
3. Australian Nuclear Science and Technology Organisation, Lucas Heights 2234, Australia
4. Structural and Computational Biology Division, The Victor Chang Cardiac Research Institute, Darlinghurst 2010, Australia