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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: J Biophotonics. 2016 Apr 20;10(3):465–472. doi: 10.1002/jbio.201600041

Figure 4.

Figure 4

ATR-FTIR spectra of sera drawn from mice before (n=4) and after (n=4) developing metabolic syndrome. In these 8 spectra, the two spectral markers at 1033 cm−1 and 1076 cm−1 do not show any difference in the metabolic syndrome samples with respect to ATR-FTIR technique. The inset shows the spectra (1140 – 1000 cm−1) of sera drawn from collagen antibody-induced arthritic (n=4) and normal (n=4) mice (total of 8). 1033 cm−1 marker is common to colitis and arthritis, but 1076 cm−1 marker is unique to colitis. All spectra are normalized to the Amide I peak (1642 cm−1).