Table 4. Structure refinement.

Resolution range (Å)	39–2.1 (2.17–2.10)
Completeness (%)	99.9
σ Cutoff	F > 1.370σ(F)
No. of reflections, working set	24872 (2303)
No. of reflections, test set	1998 (185)
Final R cryst	0.19 (0.26)
Final R free	0.21 (0.28)
No. of non-H atoms
Total	2993
Protein	2824
Ligand	0
Water	169
Total	2993
R.m.s. deviations
Bonds (Å)	0.01
Angles (°)	0.26
Average B factors (Å2)
Overall	34.77
Protein	34.3
Water	43.2
Ramachandran plot
Most favored (%)	99.43
Allowed (%)	0.57