1. Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ, U.K.
2. Almac Department of Biocatalysis & Isotope Chemistry 20 Seagoe Industrial Estate Craigavon BT63 5QD N. Ireland, U.K.
3. Arran Chemical Company Limited Unit 1 Monksland Industrial Estate Athlone Co. Roscommon Ireland
4. University College London Department of Biochemical Engineering Bernard Katz Building London WC1E 6BT, U.K.