title: Extrahelical bases in duplex DNA.
mesh_terms: D001483:Base Sequence; D002942:Circular Dichroism; D004720:Endonucleases / Q000378:metabolism; D006358:Hot Temperature; D009690:Nucleic Acid Conformation / Q000528:radiation effects; D009692:Nucleic Acid Heteroduplexes / Q000378:metabolism; D009693:Nucleic Acid Hybridization; D013936:Thymidine; D014466:Ultraviolet Rays
chemical_list: D009692:Nucleic Acid Heteroduplexes; D004720:Endonucleases; D013936:Thymidine