title: Free energy of imperfect nucleic acid helices. 3. Small internal loops resulting from mismatches.
mesh_terms: D001483:Base Sequence; D007700:Kinetics; D008970:Molecular Weight; D009690:Nucleic Acid Conformation; D012313:RNA; D012265:Ribonucleotides; D013053:Spectrophotometry; D013816:Thermodynamics
chemical_list: D012265:Ribonucleotides; D012313:RNA