Table 1. X-ray data-collection statistics.

Values in parentheses are for the highest resolution shell (1.97–1.87 Å).

Wavelength (Å)	1.42
Resolution range (Å)	35.7–1.87
Space group	P212121
Unit-cell parameters (Å, °)	a = 46.46, b = 63.07, c = 111.64
Completeness (%)	99.4 (99.4)
Redundancy	3.6 (3.8)
Rmerge† (%)	6.0 (19.3)
Average I/σ(I)	7.5 (3.7)
Total reflections	242862
Unique reflections	27816

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