Table 1.

Assignments of major vibrational bands in the SERS spectra of saliva samples

Observed raman shifts (cm−1)pp		Possible assignments
Normal	Cancerous
432	432	Skeletal bending
493	–
612	–
–	670	υ (C–S)
709	–	υ (C–S) Met
–	1097	υ (C–N)
1114	–	υ (C–C)
1269	1269	δ (=CH) Phospholipid
–	1627	Trp, Tyr and Phe
1666–1700	1666–1700	Protein (Amide I): α -helix, β -sheet, random-coil