1. BrisSynBio, University of Bristol, Bristol BS8 1TQ, U.K.
2. School of Biological Sciences, University of Bristol, Bristol Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, U.K.
3. Bristol Centre for Complexity Sciences, Department of Engineering Mathematics, University of Bristol, Bristol BS8 1UB, U.K.
4. Department of Engineering Mathematics, University of Bristol, Bristol BS8 1UB, U.K.
5. School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1UB, U.K.