title: Changes in secondary structure of poliovirus ribonucleic acid.
mesh_terms: D003609:Dactinomycin / Q000494:pharmacology; D009690:Nucleic Acid Conformation; D017955:Poliovirus / Q000032:analysis* / Q000187:drug effects / Q000378:metabolism; D012367:RNA, Viral / Q000032:analysis / Q000378:metabolism / Q000528:radiation effects; D011830:Radiation Effects; D012260:Ribonucleases; D014466:Ultraviolet Rays
chemical_list: D012367:RNA, Viral; D003609:Dactinomycin; D012260:Ribonucleases