* Corresponding authors

^a Infrared Microspectroscopy (IRM) Beamline, Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
E-mail: jitrapov@ansto.gov.au, tobinm@ansto.gov.au
Fax: +61 3 8540 4200
Tel: +61 3 8540 4177

^b Centre for Biospectroscopy, Monash University, Clayton, Victoria 3168, Australia

^c Department of Microbiology and Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3168, Australia

^d Curtin Institute for Functional Molecules and Interfaces, School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia

^e Curtin Health Innovation Research Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia