title: Letter to the editor: The polyuridylic acid complex with polyamines: an x-ray fiber diffraction observation.
mesh_terms: D001665:Binding Sites; D008968:Molecular Conformation; D009690:Nucleic Acid Conformation; D011072:Poly U; D013096:Spermine; D014961:X-Ray Diffraction
chemical_list: D011072:Poly U; D013096:Spermine