1. Department of Microbiology and Immunology, University of Melbourne, Parkville, Victoria 3010, Australia
2. The Protein Crystallography Unit, Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia
3. Victorian Transplantation and Immunogenetics Service, Australian Red Cross Blood Service, South Melbourne, Victoria 3205, Australia
4. Renal Unit, Royal Adelaide Hospital, North Terrace, Adelaide, South Australia 5000, Australia