Table 2 Attribution of the most prominent signals revealed from the Raman salivary analysis (± 5 cm⁻¹).

509 cm⁻¹

Phosphorylated protein and lipids

577 cm⁻¹

Trp, Cys

716 cm⁻¹

Phospholipids

748 cm⁻¹

O–O stretching, symmetric breathing of Trp

897 cm⁻¹

Mono and disaccharides C–O–C skeletal modes

922 cm⁻¹

Glucose/glycogen

1000 cm⁻¹

Phe ring modes

1048 cm⁻¹

C–N and C–C protein stretching

1126 cm⁻¹

Trp, Phe

1155 cm⁻¹

Glycogen

1249 cm⁻¹

Secondary bands of amide III

1288 cm⁻¹

Phosphodiester groups in nucleic acids

1317 cm⁻¹

Amide III (α-helix structures)

1384 cm⁻¹

C–H rocking in lipids

1453 cm⁻¹

General fatty acids, C–H stretching of glycoproteins