title: [Calculation of x-ray diffuse scattering curves for DNA A- and B-forms in solution].
abstract: To obtain strictest theoretical indicatrices of X-ray scattering as well as to determine the volume and surface of DNA A- and B-forms in solution a new "cube" method has been applied which has been developed earlier for description of scattering intensity and geometric characteristics of particles with a complex surface topography. A new approach to calculation of diffuse scattering intensity of strongly elongated particles in solution has been proposed. Hydration of DNA molecules has been shown to considerably affect their X-ray scattering indicatrices. It has been also shown that the known Langridge method satisfactorily describes the DNA scattering indicatrix in the large-angle region but cannot be applied to analysis of DNA scattering intensity in the small-angle and large-angle ranges of the scattering curve simultaneously.
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D004247:DNA; D009690:Nucleic Acid Conformation; D012996:Solutions; D013052:Spectrometry, X-Ray Emission
chemical_list: D012996:Solutions; D004247:DNA
vernacular_title: Raschet indikatris rentgenovskogo diffuznogo rasseianiia A- i B-form DNK v rastvore.