1EC4

SOLUTION STRUCTURE OF A HEXITOL NUCLEIC ACID DUPLEX WITH FOUR CONSECUTIVE T:T BASE PAIRS

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2mM HNA; 0.3M NaCl	D2O		7	ambient	293
2	DQF-COSY	2mM HNA; 0.3M NaCl	D2O		7	ambient	293
3	H,P-Hetcor	2mM HNA; 0.3M NaCl	D2O		7	ambient	293
4	watergate NOESY	2mM HNA; 0.3M NaCl	10% D2O, 90% H2O		7	ambient	273

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

NMR Refinement
Method	Details	Software
torsion angle dynamics, and 'gentle' refinement		VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures closest to the average of all refined structures
Conformers Calculated Total Number	100
Conformers Submitted Total Number	1
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	5.3	varian
2	data analysis	Felix	97	biosym
3	structure solution	X-PLOR	3.851	A.T. Brunger
4	refinement	X-PLOR	3.851	A.T. Brunger

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.