title: Linear dichroism demonstrates that the bases in poly[d(AC)].poly[d (GT)] and poly[d(AG)].poly[d(CT)] are inclined from perpendicular to the helix axis.
abstract: Flow linear dichroism is used to measure specific inclinations for each of the four bases in poly[d(AC)].poly[d(GT)] and poly[d(AG)].poly[d(CT)] in both the B and A forms. For the B form in solution the bases are found to have a sizable inclination. Inclination is increased in the A form, as expected. In all cases the pyrimidines are more inclined than the purines.
authors: Department of Biochemistry and Biophysics, Oregon State University, Corvallis 97331-6503.
authors: H
authors: H
authors: Kang
authors: W C
authors: WC
authors: Johnson
mesh_terms: D000225:Adenine / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003596:Cytosine / Q000737:chemistry; D006147:Guanine / Q000737:chemistry; D008968:Molecular Conformation; D011089:Polydeoxyribonucleotides / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods; D013941:Thymine / Q000737:chemistry
chemical_list: D011089:Polydeoxyribonucleotides; C050366:poly(dG-dA)n.poly(dC-dT)n; C033927:poly(dA-dC).poly(dG-dT); D006147:Guanine; D003596:Cytosine; D000225:Adenine; D013941:Thymine