title: Riboswitch structures: purine ligands replace tertiary contacts.
authors.affiliation: Institute of Molecular and Cellular Biology, UPR9002 du CNRS, Université Louis Pasteur, 15 rue René Descartes, F-67084 Strasbourg, Freance.
authors.forename: Aurélie
authors.initials: A
authors.lastname: Lescoute
authors.forename: Eric
authors.initials: E
authors.lastname: Westhof
mesh_terms: D000225:Adenine / Q000737:chemistry; D020029:Base Pairing; D018360:Crystallography, X-Ray; D006147:Guanine / Q000737:chemistry; D019271:Hypoxanthine / Q000737:chemistry; D008024:Ligands; D009690:Nucleic Acid Conformation; D011687:Purines / Q000737:chemistry*; D012313:RNA / Q000737:chemistry; D038621:Regulatory Sequences, Ribonucleic Acid
chemical_list: D008024:Ligands; D011687:Purines; D038621:Regulatory Sequences, Ribonucleic Acid; D019271:Hypoxanthine; D006147:Guanine; D012313:RNA; D000225:Adenine; C030985:purine