1. Department of Molecular Biology, Max-Planck-Institut für Biochemie,1 and
2. Centre for Biochemical Technology, Delhi University Campus, Delhi-110 0072, and
3. Axxima Pharmaceuticals AG,3 82152 Martinsried, Germany;
4. Department of Biochemistry, University of Delhi South Campus, New Delhi,4 India
5. The Public Health Research Institute, New York, New York 100165; and