Abstract
1 School of Biology, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK
2 Department of Microbiology, Freeman Hospital, Newcastle upon Tyne NE7 7DN, UK
3 Meningitis and Special Pathogens Branch, Division of Bacterial and Mycotic Diseases Branch, Division of AIDS, STD and TB Laboratory, National Centre for Infectious Diseases, Atlanta, GA 30333, USA
4 Molecular and Cellular Biochemistry, The Ohio State University, 485 Hamilton Hall, 1645 Neil Avenue, Columbus, OH 43210, USA