Table 2. Refinement and model statistics.

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

Resolution range (Å)	50–2.15 (2.21–2.15)
Rcryst†	0.189 (0.205)
Rfree†	0.232 (0.268)
R.m.s.d. bonds (Å)	0.014
R.m.s.d. angles (°)	1.34
Protein atoms	5575
Nonprotein atoms	329
Wilson B factor (Å2)	26.1
Mean B factor (Å2)	31.5
Residues in favored region	656 [94%]
Residues in allowed region	22 [3.2%]
Residues in disallowed region	10 [1.5%]
MolProbity score [percentile]	1.61 [96th]
PDB code	3ld9

^† R _cryst = . The free R factor was calculated using an equivalent equation with the 5% of the reflections that were omitted from the refinement.