Table 1. Data-collection statistics.

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

Diffraction data
Space group	P3221
Unit-cell parameters (Å)	a = b = 98.96, c = 199.26
Resolution (Å)	50–2.35 (2.41–2.35)
Mean I/σ(I)	13.8 (2.6)
R merge †	0.069 (0.563)
R mean	0.079 (0.635)
CC1/2	99.8 (81.9)
Completeness (%)	99.8 (99.9)
Multiplicity	4.6 (4.7)
No. of unique reflections	47821 (3479)
Wilson B factor (Å2)	40.4
Refinement
No. of protein atoms	5859
No. of waters	274
No. of other atoms	50
R work ‡	0.173 (0.261)
R free §	0.206 (0.325)
R.m.s.d., bonds (Å)	0.012
R.m.s.d., angles (°)	1.35
Ramachandran, favoured	745 [97.9%]
Ramachandran, outliers	None
Average B factor (Å2)
Overall	55.8
Protein	56.3
Solvent	43.5
MolProbity clashscore¶	1.31 [100th percentile]
MolProbity score¶	0.88 [100th percentile]
PDB entry	4ix8

^† R _merge = .

^‡ R _work = .

^§The free R factor was calculated with an equivalent equation to R _work using 5% of the reflections that were omitted from the refinement.

^¶Chen et al. (2010 ▶).