Table 1.

Assignment of SERS bands depicted in Fig. 6^{66,67,72–75}.

Observed SERS band (cm−1)	Protein	Lipids	Nucleic acid
650–658	Tyr (C-C twist)
725–730	Trp	C-N head group choline (H3C)3N+	A
789			PO2 symm
827	Structural protein modes of tumors
850	Tyr, Pro
925	C-C str alpha-helix, Pro, Val
960	CH3 def	CH3 def
1002	Phe
1030–1032	Phe	CH2CH3 bending modes of lipids
1090	C-N stretch	CC str chain, C-O str	PO2 symm
1125	C-N str bk	porphyrin
1170–1172	Tyr C-H in plane		T
1217	C-C6H5 str in phenylalanine tyrosine and Amide III (beta sheet)
1246	Amide III
1267–1270	Amide III (random coil)	=CH def
1319	CH3 def, collagen	CH3CH2 twist	G
1340			A,G
1417	C = C stretching in quinoid ring
1450	structural protein modes of tumors
1552			A,G
1585–1600	Phe, Tyr
1613–1618	C≡C str of Tyr and Trp
1647–1665	Amide I	C = C str