Table 1. Structure calculation statistics of ABD2.

Input Constraints
Dihedral Angle Constraints	130
NOE-derived Distances	1679
Hydrogen Bond Constraints	32
Structure Statistics
Backbone RMSD	0.54 Å
Heavy atom RMSD	1.30 Å
Residues in core region of the Ramachandran plot	83.3%
Residues in allowed region of the Ramachandran plot	16.4%
Average / maximal violation of NOE constraints	0.0222 / 0.135
Average / maximal violation of dihedral constraints	0.3669 / 0.4822