Structural statistics.

A 2412NOE cross peaks out of 2727 were assigned by CYANA. All numbers are given for the symmetric dimer. B RMSD of the backbone coordinates to the mean structure. C Analyzed by iCING. No distance/dihedral angle restraint was violated by more than 0.3 Å/5°, respectively, in any of the models. D PDB validation and deposition server (ADIT). E With Procheck. F Structure Z-scores, a positive number is better than average. * For residue 5–57 of the expression construct (RMSD < 2 Å). Structural statistics.