1QXB

NMR structure determination of the self complementary DNA Dodecamer CGCGAATT*CGCG in which a ribose is inserted between the 3'-OH of T8 and the 5'-phosphate group of C9

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	3.4mM CGCGAATT*CGCG	100% D2O	no salt added	7.2	ambient	298
2	2D TOCSY	3.4mM CGCGAATT*CGCG	100% D2O	no salt added	7.2	ambient	298
3	DQF-COSY	3.4mM CGCGAATT*CGCG	100% D2O	no salt added	7.2	ambient	298
4	2D NOESY	3.4mM CGCGAATT*CGCG	100% D2O	no salt added	7.2	ambient	283
5	2D NOESY	3.4mM CGCGAATT*CGCG, 90% H2O, 10% D2O	90% H2O/10% D2O	no salt added	7.2	ambient	283

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITY	500

NMR Refinement
Method	Details	Software
torsion angle dynamics followed by a molecular dynamics refinement		VNMR

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	1
Representative Model	1 (minimized average structure)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1b	Varian
2	processing	Felix	97.00	Biosym Technologies
3	data analysis	Felix	97.00	Biosym Technologies
4	structure solution	X-PLOR	3.851	Brnger AT
5	refinement	X-PLOR	3.851	Brnger AT

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.