title: Dissociation kinetics of 19 base paired oligonucleotide-DNA duplexes containing different single mismatched base pairs.
abstract: The dissociation kinetics of 19 base paired oligonucleotide-DNA duplex containing a various single mismatched base pair are studied on dried agarose gels. The kinetics of the dissociation are first order under our experimental conditions. The incorporation of a single mismatched base pair destabilizes the DNA duplexes to some extent, the amount depending on the nature of the mismatched base pair. G-T and G-A mismatches slightly destabilize a duplex, while A-A, T-T, C-T and C-A mismatches significantly destabilize it. The activation energy for the overall dissociation processes for these oligonucleotide-DNA duplexes containing 19 base pairs is 52 +/- 2 Kcal mol-1 as determined from the slope of Arrhenius plot.
mesh_terms: D001482:Base Composition; D004247:DNA; D005796:Genes; D005914:Globins / Q000235:genetics; D006801:Humans; D007700:Kinetics; D009693:Nucleic Acid Hybridization; D009838:Oligodeoxyribonucleotides; D010957:Plasmids; D013816:Thermodynamics
chemical_list: D009838:Oligodeoxyribonucleotides; D005914:Globins; D004247:DNA