Спостереження іон-фосфатних коливань макромолекули ДНК

Abstract

It is shown that, in the low-frequency Raman spectra of Cs-DNA, the mode of ion-phosphate vibrations exists. Together with the modes of H-bond stretching in base pairs, it forms the band near 100 cm−1 with intensity about twice as much than that in the spectra of Na-DNA. The mode of Na-DNA ion-phosphate vibrations is much lower in intensity and is located within a broad band near 180 cm−1.