1. Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ U.K.
2. Department of Biochemical Engineering Bernard Katz Building University College London London WC1E 6BT U.K.
3. Almac Sciences Department of Biocatalysis and Isotope Chemistry Almac House, 20 Seagoe Industrial Estate Craigavon BT63 5QD Northern Ireland U.K.
4. Arran Chemical Company Unit1 Monksland Industrial Estate Athlone N37 DN24 Co. Roscommon Ireland.