1S4A

NMR Structure of a D,L alternating decamer of norleucine: double antiparallel beta-helix

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D TOCSY	HXMe 5mM	d-chloroform			ambient	298
2	ROESY	HXMe 5mM	d-chloroform			ambient	298
3	HSQC	HXMe 5mM	d-chloroform			ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	500

NMR Refinement
Method	Details	Software
molecular dynamics	This structures are based on a total of 130 distance restraints, where 80 are between backbone protons.	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	collection	XwinNMR		Bruker
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.