Table 1. X-ray data-collection statistics.

Values in parentheses are for the highest resolution shell (2.54–2.40 Å).

Wavelength (Å)	1.42
Resolution range (Å)	25.0–2.40
Space group	P21
Unit-cell parameters (Å, °)	a = 65.07, b = 111.87, c = 89.84, β = 92.77
Completeness (%)	95.0 (73.7)
Redundancy	2.8 (2.5)
Rmerge† (%)	5.1 (12.6)
Average I/σ(I)	9.7 (4.2)
Total reflections	251430
Unique reflections	48944

^† R _merge = , where I _i is the intensity of the ith observation and 〈I〉 is the mean intensity of the reflections.