Affiliation: | (1) School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K;(2) Biological NMR Centre, Leicester University, P.O. Box 138, Maurice Shock Building, Leicester, LE1 8HN, U.K;(3) School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K |