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An intramolecular quadruplex of (GGA)(4) triplet repeat DNA with a G:G:G:G tetrad and a G(:A):G(:A):G(:A):G heptad, and its dimeric interaction
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D NOESY 2 mM DNA; 10 mM sodium phosphate buffer (pH 6.5); 100 mM KCl; 95% H2O/5% D2O 100 mM KCl 6.5 ambient 274 2 2D NOESY 2 mM DNA; 10 mM sodium phosphate buffer (pH 6.5); 100% D2O 100 mM KCl 6.5 ambient 298 3 2D TOCSY 2 mM DNA; 10 mM sodium phosphate buffer (pH 6.5); 100% D2O 100 mM KCl 6.5 ambient 298 4 DQF-COSY 2 mM DNA; 10 mM sodium phosphate buffer (pH 6.5); 100% D2O 100 mM KCl 6.5 ambient 298
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker DRX 600
NMR Refinement Method Details Software simulated annealing X-PLOR
NMR Ensemble Information Conformer Selection Criteria structures with the lowest energy Conformers Calculated Total Number Conformers Submitted Total Number 1 Representative Model 1 (lowest energy)
Computation: NMR Software # Classification Version Software Name Author 1 structure solution X-PLOR 3.851 Brunger 2 refinement X-PLOR 3.851 Brunger