Table 1. X-ray data-collection and processing statistics.

Values in parentheses are for the highest resolution shell.

Source	SSRF beamline BL17U1
X-ray wavelength (Å)	0.97947
Space group	P43212
Unit-cell parameters (Å)	a = b = 114.75, c = 57.71
Resolution range (Å)	50–2.70 (2.75–2.70)
Unique reflections	10722 (536)
Redundancy	7.3 (7.5)
Completeness (%)	96.5 (98.7)
Wilson B value (Å2)	84.2
Rmerge† (%)	6.1 (37.7)
Rmeas‡ (%)	6.6 (40.5)
〈I/σ(I)〉	33.6 (3.5)

^† R _merge = .

^‡ R _meas = .