Abstract
1School of Microbiology and Immunology, University of New South Wales, Sydney, New South Wales, Australia 2033
6Electron Microscopy Unit, University of New South Wales, Sydney, New South Wales, Australia 2033
2Forsyth Dental Center, Boston, Massachusetts 02115
3Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
4Department of Microbiology, University of Queensland, St. Lucia, Queensland, Australia 4067
5Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia, Canada V8W 2Y2