Table 1.

Refinement statistics

Resolution, Å	50.0–2.3
Rwork, %	21.5 (23.3)
Rfree, %	24.2 (26.3)
rms deviation from ideal values
Bond length, Å	0.0058
Bond angles, °	1.16
Dihedral angles, °	21.78
Improper angles, °	0.86
Average B-factor, Å2	38.18

Values in parentheses are for the highest resolution shell (2.38–2.30 Å). 

R_work = ∑|F_O − F_C|/∑|F_O| for the working set reflections (95% of the data) used for the refinement. R_free = ∑|F_O − F_C|/∑|F_O| for the test set reflections (5% of the data) excluded from the refinement.