1. School of Molecular Sciences, The University of Western Australia, Perth, Western Australia 6009, Australia
2. Microbial Screening Technologies Pty. Ltd., Smithfield, New South Wales 2164, Australia
3. Commonwealth Scientific and Industrial Research Organisation, North Ryde, New South Wales 2113, Australia
4. Department of Molecular Sciences, Macquarie University, Sydney, New South Wales 2109, Australia