Table 2. Data collection and processing.

Values in parentheses are for the outer shell.

	Chom-18Br	Chom-18	Hpar-18
Diffraction source	MX 14.2, HZB	MX 14.2, HZB	MX 14.2, HZB
Wavelength (Å)	0.919831	0.979491	0.979491
Temperature (K)	100	100	100
Crystal-to-detector distance (mm)	326	289	304
Rotation range per image (°)	0.1	0.1	0.1
Total rotation range (°)	357	360	210
Exposure time per image (s)	0.2	0.2	0.2
Space group	P43212	P43212	P43212
a, b, c (Å)	38.47, 38.47, 90.78	38.44, 38.44, 89.58	38.56, 38.56, 89.94
α, β, γ (°)	90, 90, 90	90, 90, 90	90, 90, 90
Mosaicity (°)	0.2	0.2	0.2
Resolution range (Å)	45.4–2.6 (2.72–2.60)	44.8–2.7 (2.85–2.70)	45.0–2.9 (3.10–2.90)
Total No. of reflections	53968 (6716)	47846 (6928)	23027 (4393)
No. of unique reflections	2401 (276)	2126 (290)	1758 (299)
Completeness (%)	100.0 (100.0)	99.9 (100.0)	99.9 (100.0)
Multiplicity	22.5 (24.3)	22.5 (23.9)	13.1 (14.7)
〈I/σ(I)〉	26.7 (1.4)	24.7 (2.2)	20.0 (3.7)
R p.i.m.	0.013 (0.590)	0.014 (0.372)	0.019 (0.188)
Overall B factor from Wilson plot (Å2)	89	88	116