1. E. Zablackis, W. S. York, M. Pauly, S. Hantus, P. Albersheim, A. Darvill, Complex Carbohydrate Research Center and Department of Biochemistry and Molecular Biology, University of Georgia, 220 Riverbend Road, Athens, GA 30602-4712, USA.
2. W.-D. Reiter, Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT 06269, USA.
3. C. C. S. Chapple, Department of Biochemistry, Purdue University, West Lafayette, IN 47907, USA.