Figure 1.

Representative IR spectra of the control, CIS, TCIS and RRMS patients’ CSF samples: (A) absorbance spectra in the 3750–750 cm⁻¹ region (normalized with respect to the amide A band located at 3330 cm⁻¹), (B) second derivative vector normalized spectra in the C-H region (3050–2800 cm⁻¹), and second derivative vector normalized spectra in the (C) 1800–1250 cm⁻¹, and (D) 1250–750 cm⁻¹ ranges of the fingerprint region (the labeled peaks are assigned in Table S-2).