Table 1.
Principal infrared absorption bands, relative intensities and assignments for calf-thymus dna in aqueous solution at pH 7 ± 0.2
| Wavenumber (cm−1) | Intensitya | Assignment (19,20,26) |
|---|---|---|
| 1717 | vs | Guanine (C=O stretching) |
| 1663 | vs | Thymine (C2=O stretching) |
| 1609 | s | Adenine (C7=N stretching) |
| 1579 | sh | Purine stretching (N7) |
| 1529 | w | In-plane vibration of cytosine and guanine |
| 1492 | m | In-plane vibration of cytosine |
| 1222 | vs | Asymmetric PO−2 stretch |
| 1088 | vs | Symmetric PO−2 stretch |
| 1053 | s | C–O deoxyribose stretch |
| 968 | s | C–C deoxyribose stretch |
| 892 | m | Deoxyribose, B-marker |
| 836 | m | Deoxyribose, B-marker |
aRelative intensities: s, strong; sh, shoulder; vs, very strong; m, medium; w, weak.