1. Department
of Macromolecular Biochemistry, Leiden Institute of Chemistry, Einsteinweg
55, 2333 CC Leiden, The Netherlands
2. Department
of Bio-organic Synthesis, Leiden Institute of Chemistry, Einsteinweg
55, 2333 CC Leiden, The Netherlands
3. Department of Medical Biochemistry, Leiden Institute of Chemistry, Einsteinweg 55, 2333
CC Leiden, The Netherlands
4. Department of Medical Biochemistry, Academic Medical Center, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands