title: Crystal structure of a naturally occurring dinucleoside monophosphate: uridylyl (3',5') adenosine hemihydrate.
abstract: The crystal structure of uridylyl (3',5') adenosine hemihydrate has been analyzed by x-ray diffraction. The two independent molecules found in the asymmetric unit exhibit conformations that differ significantly from those found in double-helical RNA. The conformational information obtained from this analysis provides considerable insight into the possible conformations of nonhelical "loop" regions of transfer RNA, as well as single-stranded regions of nucleic acids in general.
mesh_terms: D001483:Base Sequence; D008961:Models, Structural; D009705:Nucleosides / Q000032:analysis*; D011119:Polynucleotides / Q000032:analysis; D011487:Protein Conformation; D014961:X-Ray Diffraction
chemical_list: D009705:Nucleosides; D011119:Polynucleotides