title: Study of DNA films by the CD, X-ray and polarization microscopy techniques.
abstract: DNA films with psi +/- CD spectra have been investigated. X-ray analysis has shown the sign of the psi spectra to be independent of the secondary structure of DNA. The appearance of the psi spectra is attended by the formation of a characteristic polygonal texture of the cholesteric type in the DNA film.
mesh_terms: D000818:Animals; D002417:Cattle; D002942:Circular Dichroism; D004247:DNA; D004279:DNA, Viral; D004577:Electron Probe Microanalysis; D009690:Nucleic Acid Conformation; D010781:Photography; D013604:T-Phages; D013950:Thymus Gland; D014961:X-Ray Diffraction
chemical_list: D004279:DNA, Viral; D004247:DNA