1. Te Aka Ma̅tuatua School of Science, University of Waikato, Hamilton 3214, New Zealand
2. Centre for Computational Chemistry, School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K.
3. School of Engineering, University of Waikato, Hamilton 3214, New Zealand
4. Department of Biology and Biochemistry, Centre for Biosensors, Bioelectronics and Biodevices, University of Bath, Bath ST16 2TB, U.K.
5. School of Biochemistry, University of Bristol, University Walk, Bristol BS8 1TD, U.K.