2ERI

Solution structure of circulin B

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	1mM circulin B pH 3.5; 70% H2O, 20% CD3CN, 10% D2	70% H2O, 20% CD3CN, 10% D2O	1	3.5	ambient	295
2	2D TOCSY	1mM circulin B pH 3.5; 70% H2O, 20% CD3CN, 10% D2	70% H2O, 20% CD3CN, 10% D2O	1	3.5	ambient	295
3	DQF-COSY	1mM circulin B pH 3.5; 70% H2O, 20% CD3CN, 10% D2	70% H2O, 20% CD3CN, 10% D2O	1	3.5	ambient	295
4	E-COSY	1mM circulin B pH 3.5; 70% H2O, 20% CD3CN, 10% D2	70% H2O, 20% CD3CN, 10% D2O	1	3.5	ambient	295

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	ARX	500
2	Bruker	DMX	750

NMR Refinement
Method	Details	Software
torsion angle dynamics		XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	3.5	Bruker
2	data analysis	XEASY	1.3.7	Eccles et al
3	structure solution	DYANA	1.5	Guntert et al
4	structure solution	CNS	1.1	Brunger
5	refinement	CNS	1.1