title: Letter: An "acid" structure for polyriboguanylic acid observed by X-ray diffraction.
mesh_terms: D006863:Hydrogen-Ion Concentration; D011068:Poly G / Q000032:analysis*; D011131:Polyribonucleotides / Q000032:analysis*; D014961:X-Ray Diffraction
chemical_list: D011131:Polyribonucleotides; D011068:Poly G