Table 1. Data-collection statistics.

Values in parentheses are for the highest resolution shell.

Beamline	BL17U1
Wavelength (Å)	0.9792
Crystal-to-detector distance (mm)	300
Oscillation range per frame (°)	1
Images taken	360
Resolution (Å)	50.0–2.7 (2.8–2.7)
Space group	P3121
Mosaicity (°)	0.349
Unit-cell parameters (Å)	a = b = 72.2, c = 260.4
No. of molecules per asymmetric unit	6
Matthews coefficient (Å3 Da−1)	2.48
Solvent content (%)	50.4
No. of observed reflections	482075
No. of unique reflections	41581
Completeness (%)	100.0 (100.0)
Multiplicity	11.6 (11.6)
Average I/σ(I)	29.3 (7.9)
Rmerge† (%)	8.2 (32.6)

^† R _merge = , where I _i(hkl) is the intensity of observation i of reflection hkl.