Table 1. X-ray diffraction data and refinement statistics.

Values in parentheses are for the outermost resolution shell.

Wavelength (Å)	0.9794
Resolution (Å)	15–2.3 (2.37–2.30)
Space group	P21212
Unit-cell parameters (Å)	a = 131.45, b = 137.15, c = 58.25
Redundancy	9.1 (6.7)
Unique reflections	48553 (4872)
Completeness (%)	96.7 (90.1)
〈I/σ(I)〉	20.3 (4.7)
Rsym†	0.091 (0.330)
Rcryst‡	0.21 (0.23)
Rfree (5% data)	0.28 (0.30)
No. of protein atoms per AU	8,147
R.m.s.d. bonds (Å)	0.016
R.m.s.d. angles (°)	1.459
Average B (all atoms) (Å2)	27.6
Solvent molecules (sulfate/water)	17/120
Ramachandran plot statistics
Favored regions (%)	92.4
Additional allowed regions (%)	7.6

^† R _sym = .

^‡ R _cryst = .