Table 2. Refinement and model statistics.

Values in parentheses are for the highest of 20 resolution shells.

Resolution range (Å)	20–1.6 (1.64–1.60)
Rcryst†	0.186 (0.180)
Rfree†	0.217 (0.227)
R.m.s.d. bonds (Å)	0.015
R.m.s.d. angles (°)	1.273
Protein atoms	6109
Heteroatoms	6
Waters	548
Mean B factor (Å2)	16.7
Residues in favored region (%)	97.6
Residues in allowed region (%)	100
MolProbity‡ score [percentile]	0.91 [100th]

^† R _cryst = . The free R factor was calculated with the 5% of the reflections that were omitted from the refinement (Winn et al., 2011 ▶).

^‡Chen et al. (2010 ▶), Davis et al. (2007 ▶).