Table 1. Spectral peaks identifying structural differences (P ≤ 0.05) between the DNA of the younger normal men (ages 16–36 years; n = 9) and the cancer DNA phenotype of the older healthy men (ages 55–80 years; n = 5).

Wavenumber, cm–1	Peak strength	Significant differences in peak amplitudes, P values	Structural assignments (vibrations)
1689	Strong	0.01	Guanine residue: C=O stretching and NH2 scissoring
1647	Strong	0.05	Cytosine residue: in-plane ring
1605	Strong	<0.01	Adenine residue: NH2 bending and C=N stretching
1577	Weak	<0.01	Thymine residue: ring stretching
1531	Weak	0.03	Base residues: in-plane ring vibrations of NH and CH deformation modes
1482	Weak	<0.01	Base residues: in-plane ring vibrations of NH and CH deformation modes
1415	Weak	0.04	Base residues: in-plane ring vibrations of NH and CH deformation modes
1369	Weak	0.04	Base residues: in-plane ring vibrations of NH and CH deformation modes
1231	Strong	0.04	PO2– antisymmetric stretching
1088	Strong	<0.01	PO2– symmetric stretching
1021	Medium and broad	<0.01	Deoxyribose residue: in-plane
1020	Medium and broad	<0.01	Deoxyribose residue: in-plane
964	Strong	<0.01	C–C stretching
886	Weak	0.01	Base residues: out-of-plane
884	Weak	0.02	Base residues: out-of-plane