Table 1. Data-collection and processing statistics.

Values in parentheses refer to the highest resolution shell.

	Type 1	Type 2
Wavelength (Å)	0.979	0.979
Space group	R32	I222
Unit-cell parameters
a (Å)	128.92	133.35
b (Å)	128.92	155.39
c (Å)	175.30	168.84
Molecules per AU	2	6
Matthews coefficient (Å3 Da−1)	2.25	2.33
Solvent content (%)	45	47
Resolution range (Å)	41–1.6 (1.66–1.6)	50–2.0 (2.07–2.00)
Total observations	803467	719529
Unique reflections	73674	117205
Average I/σ(I)	33.6 (2.5)	18.2 (1.9)
Rmerge† (%)	0.071 (0.713)	0.082 (0.655)
Completeness (%)	100.0 (100.0)	99.3 (99.1)

^† R _merge = , where I _h,j is the jth observation of reflection h and 〈I _h〉 is the mean intensity of that reflection.