1. Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, U.K.
2. The Kavli Institute for Nanoscience Discovery, University of Oxford, South Parks Road, Oxford OX1 3QU, U.K.
3. Centre for Bacterial Cell Biology, Biosciences Institute, Newcastle University, Richardson Road, Newcastle upon Tyne NE2 4AX, U.K.
4. Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR 999077, China
5. Institute for Molecular Bioscience, University of Queensland, Carmody Road, Brisbane, Queensland 4072, Australia
6. Department of Biology, University of Oxford, South Parks Road, Oxford OX1 3RB, U.K.