Table 1. Data-collection statistics.

Values in parentheses are for the highest resolution shell.

	Native	Se-Peak1	Se-Peak2	Se-Merged
Beamline	Bessy-MX BL-14.1
Detector	Rayonics MX-225 3 × 3 CCD detector
Temperature (K)	100
Wavelength (Å)	0.95373	0.97966
Space group	P21212	P21212	P21212	P21212
Unit-cell parameters (Å, °)
a (Å)	153.34	153.11	153.40
b (Å)	163.10	163.18	163.96
c (Å)	51.93	51.98	52.06
α = β = γ (°)	90	90	90
Resolution range (Å)	2.54 (2.54–2.61)	3.4 (3.4–3.49)	3.0 (3.0–3.08)	3.0 (3.0–3.08)
Unique reflections	43804 (3072)	34062 (2390)	50039 (3637)	50308 (3639)
Average multiplicity	7.05 (6.1)	5.09 (4.74)	2.62 (2.50)	6.05 (2.50)
Completeness (%)	99.6 (95.2)	98.4 (91.5)	98.9 (96.4)	99.4 (96.4)
Mean I/σ(I)	24.39 (3.17)	13.60 (4.25)	10.51 (2.01)	9.86 (1.13)
Rmerge† (%)	7.2 (63.2)	10.7 (38.2)	9.4 (52.7)	15.1 (52.7)
Rmeas‡ (%)	7.8 (69.1)	11.9 (42.9)	11.9 (67.4)	16.4 (67.2)
Rmrgd-F§ (%)	9.5 (55.5)	12.3 (40.5)	21.0 (90.8)	17.3 (91.7)
Wilson B value (Å2)	50.381	49.19	48.712	61.26

^† R _merge = , where I _i(hkl) is the intensity measurement for reflection hkl and 〈I(hkl)〉 is the mean intensity of symmetry-related reflections and replicates.

^‡ R _meas is defined as (Diederichs & Karplus, 1997 ▶).

^§ R _mrgd-F is defined as (Diederichs & Karplus, 1997 ▶).