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NMR OBSERVATION OF A-TETRAD
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D NOESY 2 mM potassium phosphate, 0.2 mM EDTA, 2-100 mM KCl 90% H2O/10% D2O 7.3 1 atm 2 2D NOESY 2 mM potassium phosphate, 0.2 mM EDTA, 2-100 mM KCl D2O 7.3 1 atm 3 2D TOCSY 2 mM potassium phosphate, 0.2 mM EDTA, 2-100 mM KCl D2O 7.3 1 atm 4 E-COSY 2 mM potassium phosphate, 0.2 mM EDTA, 2-100 mM KCl D2O 7.3 1 atm
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Varian UNITYPLUS 600 2 Bruker AMX 500
NMR Refinement Method Details Software Restrained energy minimization, simulated annealing-restrained molecular dynamics. Iterative relaxation matrix refinement VNMR
NMR Ensemble Information Conformer Selection Criteria structures with acceptable covalent geometry Conformers Calculated Total Number 8 Conformers Submitted Total Number 7 Representative Model 1 (closest to the average)
Additional NMR Experimental Information Details temperature, pH and salt dependent 1D spectra. Temperature varied from 0 to 70 C
Computation: NMR Software # Classification Version Software Name Author 1 collection VNMR 6.1 Varian 2 data analysis Felix 230 and 97 BIOSYM 3 collection XwinNMR 1.3 Bruker 4 structure solution Discover 3.1 BIOSYM 5 refinement IRMA 2.3 BIOSYM