Identification of a new electronic transition in the Z form of poly(dG-dC)·poly(dG-dc) by infrared absorption and resonance Raman spectroscopy

✍ Scribed by L. Chinsky; B. Jolles; A. Laigle; P. Y. Turpin; J. Taboury; E. Taillandier

• Publisher: Wiley (John Wiley & Sons)
• Year: 1984
• Tongue: English
• Weight: 595 KB
• Volume: 23
• Category: Article
• ISSN: 0006-3525
• DOI: 10.1002/bip.360231009

✦ Synopsis

Infrared absorption and resonance Raman spectroscopy (RRS) are used to study poly(dG-dC).poly(dG-dC) in two different forms: the right-handed B form a t low ionic strength and the left-handed 2 form a t high ionic strength. The existence of a new electronic absorption band in the 290-300-nm region is evidenced by uv RRS studies of the 2 form a t different wavelengths of excitation. Infrared absorption spectra prove that this new electronic band is polarized perpendicularly to the cytosine plane. The possibility of a nr* character of this transition moment is discussed.