1. Department of Bioengineering, Imperial College London, London SW7 2AZ, U.K.
2. Centre for Synthetic Biology, Imperial College London, London SW7 2AZ, U.K.
3. College of Life Sciences, Nankai University, Tianjin 300071, China
4. SynbiCITE Innovation and Knowledge Centre, Imperial College London, London SW7 2AZ, U.K.