1S1O

NMR Structure of a D,L Alternating pentadecamer of norleucine: double antiparallel beta-helix

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	DQF-COSY	4.7 mM	Chloroform-d			ambient	303
2	2D TOCSY	4.7 mM	Chloroform-d			ambient	303
3	2D ROESY	4.7 mM	Chloroform-d			ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITY	400

NMR Refinement
Method	Details	Software
molecular dynamics	Structures based on a total of 68 restraints: 28 interchain distance constraints and 40 intrachain distance constraints	Discover

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	5
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear techniques

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	Discover	2.9.7	BIOSYM
2	data analysis	VNMR		VARIAN
3	refinement	Discover	2.9.7	BIOSYM

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.