Table 1. Structure refinement statistics.

NMR constraints	1,247
Distance	1,059
Intraresidue	488
Sequential (i, i + 1)	207
Medium range (i, j ≤ 4)	41
Long range (i, j > 5)	209
Ambiguous	114
(Restraints per residue: 11)
Torsion (ϕ, ψ)	162
H bond	26
Violations (20 SA structures; no NOE violations > 0.5 Å)
NOE violations (> 0.2 Å)
Number	1.91 ± 0.684
RMSD, Å	0.0187 ± 0.0009
Torsion violations
Number > 5 deg	0.55 ± 0.80
RMSD, deg	0.66 ± 0.15
Deviation from ideal geometry
Bond length, Å	0.0025 ± 0.00028
Bond angle, deg	0.4121 ± 0.0350
RMSD from mean structure (Å) (residues 12-80)
Backbone	0.55
Heavy atoms	1.26
Ramachandran analysis, %
Most favored region	87.3
Additionally allowed region	12.7

RMSD, rms deviation.