title: Size and secondary structure of potato spindle tuber viroid.
mesh_terms: D008854:Microscopy, Electron; D008970:Molecular Weight; D009691:Nucleic Acid Denaturation; D010942:Plant Viruses / Q000648:ultrastructure*; D012367:RNA, Viral / Q000032:analysis*; D014675:Vegetables
chemical_list: D012367:RNA, Viral