1. Department of Biological Sciences, University of Exeter, Prince of Wales Road, EX4 4PS, Exeter (UK), Fax: (+39) 0577 234333
2. Current address: C.R.O.M. Oncology Research Centre “Fondazione Lo Vuolo” Via Ammiraglio Bianco, 83013 Mercogliano (AV) (Italy)
3. Current address: Laboratoire de Biochimie Structurale et Fonctionnelle des Protéines, CNRS FRE 2852, Université Pierre et Marie Curie Case 29, 7 quai St. Bernard, 75252 Paris (France)
4. RheoGene Inc., 2650 Eisenhower Ave., Norristown, PA 19027 (USA)
5. Current address: Bioprocess and Bioanalytical Research, Merck & Co. Inc. West Point, PA 19486 (USA)
6. The Chem21 Group Inc., 1780 Wilson Drive, Lake Forest, IL 60045 (USA)
7. College of Pharmacy, University of New Mexico, Albuquerque, NM 87131‐0001 (USA)
8. Intrexon Corp., 2650 Eisenhower Ave., Norristown PA 19027 (USA)