1. School
of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
2. Department
of Biochemistry, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
3. York
Structural Biology Laboratory, Department of Chemistry, University of York, Heslington YO10 5DD, United Kingdom
4. Department
of Chemistry, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
5. School
of Biochemistry, University of Bristol, Bristol BS8 1TD, United Kingdom
6. BrisSynBio, University of Bristol, Life Sciences
Building, Bristol BS8 1TQ, United Kingdom