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Biophysical Journal 68: 1045-1049 (1995)
© 1995 the Biophysical Society

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Conformational studies of the smallest structural motifs of DNA detectable via vibrational circular dichroism: cytidylyl-(3'-5')-guanosine and guanylyl-(3'-5')-cytidine.

S S Birke and M Diem

Department of Chemistry, City University of New York, Hunter College, New York 10021, USA.

ABSTRACT

The infrared absorption and vibrational circular dichroism (VCD) spectra of buffered aqueous solutions of cytidylyl-(3'-5')-guanosine (5'(CG)3') and guanylyl-(3'-5')-cytidine (5'(GC)3') are reported. Under low ionic strength conditions, these dinucleotides exhibit VCD features that can be predicted qualitatively from structural data of (CG)2 and (GC)2 sequences of poly(dG-dC).poly(dG-dC), using the exciton model for infrared VCD intensities.






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Copyright © 1995 by the Biophysical Society.