Acta Optica Sinica, Volume. 14, Issue 7, 762(1994)
Low-Frequency Vibritional Mode of Poly(dT)· Poly(dA)· Poly(dT) Triple Helix
Low-frequency vibritional modes are calculated for poly (dT). poly (dA).poly(dT) triple helix by the lattice dynamical theory. Long-range interaction is found tobe important for low-ftequency vibtitional mode. Both Watson-Crick hydrogen-bond andHoogensteen hydrogen-bond have a cluster of breathing modes centered about 90 cm-1,but Hoogensteen hydrogen-bond has another several very strons breathing modes in lowerfrequency. This result explains qualitatively the melting of poly(dT).poly(dA).poly(dT) in low salt solution.
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[in Chinese], [in Chinese]. Low-Frequency Vibritional Mode of Poly(dT)· Poly(dA)· Poly(dT) Triple Helix[J]. Acta Optica Sinica, 1994, 14(7): 762