Low-frequency, Raman-active vibrational modes of poly(dA)poly(dT)
The Raman activity of low-frequency (20-300 cm-1) vibrational modes of dehydrated, oriented fibers of the sodium salts of poly(dA)poly(dT) and random sequenced DNA have been measured. Distinct bands near 60, 75-100, and 125-140 cm-1 are resolved in poly(dA)poly(dT). The Raman activity of the two lowest bands correlate with the previously observed infrared activity of poly(dA)poly(dT). The apparent reduction in spectral line broadening for poly(dA)poly(dT), as demonstrated by this and previous measurements of a number of different polynucleotides, is considered as possible evidence for inhomogeneous line broadening. © 1989 The American Physical Society.
Liu, C; Edwards, GS; Morgan, S; Silberman, E
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