1. Astbury Centre for
Structural Molecular Biology and School of Molecular and Cellular
Biology, University of Leeds, Leeds LS2 9JT, U.K.
2. Centre for Computational Chemistry, School
of Chemistry, University of Bristol, Bristol BS8 1TS, U.K.
3. Astbury Centre for Structural Molecular
Biology and School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.