Department of Biochemistry, Department of Microbiology and Immunology and Genetics Otago, University of Otago, Dunedin 9054, New Zealand.|Department of Biochemistry, Department of Microbiology and Immunology and Genetics Otago, University of Otago, Dunedin 9054, New ZealandDepartment of Biochemistry, Department of Microbiology and Immunology and Genetics Otago, University of Otago, Dunedin 9054, New Zealand.|Department of Biochemistry, Department of Microbiology and Immunology and Genetics Otago, University of Otago, Dunedin 9054, New ZealandDepartment of Biochemistry, Department of Microbiology and Immunology and Genetics Otago, University of Otago, Dunedin 9054, New Zealand.