1. Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461
2. Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Tallahassee, Florida 32310
3. Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306
4. Carbohydrate Chemistry Team, Industrial Research Ltd., Lower Hutt, New Zealand