The Australian dataset was recorded using an Alpha FTIR spectrometer from Bruker (Ettlingen, Germany) as described elsewhere . 0.8 μL of protein extract were pipetted onto the 1 reflexion ATR diamond cell and dried under gentle air flow for 2 minutes. 40 scans were co-averaged (measurement time ≈ 1 min) from 4000 cm 1 to 800 cm 1 . A background measurement of the clean diamond crystal with 128 scans was recorded between each biological replicate. The spectral resolution was 4 cm -1 . The instrument was operated with the OPUS software from Bruker, and the CO2/H2O correction integrated in this software was performed over the spectra prior to analysis.