Try Anachem www.anachem-ltd.com <http://www.anachem-ltd.com> They are slightly cheaper. <mailto:david.hislop at buckingham.ac.uk> david.hislop at buckingham.ac.uk <http://www.buckingham.ac.uk/clore/> Clore Laboratory <http://www.buckingham.ac.uk/> UNIVERSITY OF BUCKINGHAM Buckingham. MK18 1EG. United Kingdom Tel: 01280-820-323 Fax: 01280-820-261 ---