Table 1 Peak location of the main Raman spectra of human serum.

From: Raman spectroscopy combined with a support vector machine algorithm as a diagnostic technique for primary Sjögren’s syndrome

Peak (cm−1)

Assignment

Raman peak intensity comparison to healthy controls (Increase/decrease)

959

Proline

Decrease

1003

Phenylalanine

Decrease

Phenylalanine (collagen assignment)

1155

Carotenoids (absent in normal tissue)

Decrease

1355

Tryptophan

Decrease

1514

β-Carotene accumulation (C–C stretch mode)

Decrease

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