Table 1. Data-collection and refinement statistics.

Values in parentheses are for the highest resolution shell.

Data collection
X-ray source	ID29, ESRF, Grenoble
Wavelength (Å)	0.978
Space group	I4
Unit-cell parameters (Å)	a = b = 111.9, c = 197.7
Resolution (Å)	1.5
No. of unique reflections	192721
Completeness (%)	99.6 (98.4)
R meas †	0.101 (0.742)
〈I/σ(I)〉	8.9 (1.8)
CC1/2	99.4 (43.9)
Refinement statistics
Residues in model	A13–A475, I1–I123, B12–B475, J1–J123
No. of solvent molecules	1017
No. of ethylene glycol molecules	14
No. of 2-CABP molecules	2
No. of Mg2+ ions	2
Twin fraction	0.48
R cryst ‡	0.136
R free §	0.152
R.m.s.d., bond lengths (Å)	0.006
R.m.s.d., angles (°)	0.877

^†As defined by Diederichs & Karplus (1997 ▸).

^‡ R _cryst = , where F _obs and F _calc are the observed and calculated structure-factor amplitudes, respectively.

^§ R _free was calculated from a randomly selected 5% of unique reflections.