1. Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 639798, Singapore
2. School of Biological Science, University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT, UK
3. Department of Food Science, University of Guelph, Guelph, ON, N1G 2W1, Canada
4. Structural Biophysics Group, School of Optometry and Vision Sciences, Cardiff University, Redwood Building, Cardiff, CF10 3NB, UK