1. Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge, CB2 1EZ, United Kingdom
2. Department
of Biochemistry, University of Cambridge, Sanger Building, 80 Tennis Court
Road, Cambridge CB2 1GA, United Kingdom
3. John Innes Centre, Norwich Research Park, Colney
Lane, Norwich, Norfolk NR4 7UH, United Kingdom
4. UCB, 208 Bath Road, Slough, West Berkshire SL1 3WE, United Kingdom