Table 1. Data collection and refinement statistics.

Data collection
Beamline	I02
wavelength (Å)	0.9795
space group	P212121
cell dimensions
a, b, c (Å)	60.95 97 111.39
α, β, γ (o)	90 90 90
Resolution (Å)	2.183
Rmerge	4.30%
Mean I/σI	18.3
completeness (%)	99.22
Redundancy	4
Refinement
Resolution (Å)	2.12
No.reflections	36277
Rwork/Rfree	22.2/25.3
No.atoms	4010
B-factors (Å2): protein	49.365
r.m.s. deviations
Bond lengths (Å)	0.005
Bond angles (o)	1.029