Abstract
1 Department of Virology, Imperial College Faculty of Medicine, Norfolk Place, London W2 1PG, UK
2 Ludwig Institute for Cancer Research, University of Tokyo, Tokyo 113-8655, Japan
3 Department of Physiological Chemistry and Metabolism, University of Tokyo, Tokyo 113-8655, Japan
4 Institute of Pharmacology, Medical School Hannover, Carl Neuberg Strasse 1, D-30625 Hannover, Germany
5 Department of Biochemistry and Molecular Biology, University College London, UK