Peak assignments for nucleic acids^a.

Contributing group	Frequency (cm−1)	Assignment
Base	726	Ring breathing of A58
	668, 746, 785	Ring breathing of T58
	668	Ring breathing of G58
	781, 785	Ring breathing of C58
	785	Ring breathing of U58
	1257	Ring mode (C, T)58
	1336	Ring mode (A, G); A form of DNA59
	1485	Ring stretching (G, A) A form of DNA59
	1576	Ring stretching (A, G); A form of DNA59
Backbone	807	ν as(O–P–O), νs(O–P–O); A-DNA52
	1099	ν s(PO2−); A-DNA52
	1415	df(CH2); A-DNA52
	784	ν s(O–P–O); B-DNA52
	830	ν as(O–P–O); B-DNA52
	1090	ν s(PO2−); B-DNA52
	1420	df(CH2); B-DNA52
	748	ν s(O–P–O); Z-DNA
	792	ν as(O–P–O); Z-DNA
	810	ν as(O–P–O); Z-DNA
	1095	ν s(PO2−); Z-DNA
	1425	df(CH2); Z-DNA

^a ν: stretching (s: symmetric, as: asymmetric), b: bending, t: twisting, df: deformation, A: adenine, T: thymine, C: cytosine, G: guanine, U: uracil, A-DNA: A-form of DNA, B-DNA: B form of DNA, Z-DNA: Z form of DNA.