Table I. Data collection and refinement statistics.

Wavelength (Å)	1.11
Resolution (last shell)	20–2.9 (3.0–2.9)
Unique reflections	12 550
Redundancy	6.4
Completeness (%)	99.9 (99.8)
Rsym (%)	9.3 (42)
I/σ	9.2 (1.9)
Rcryst (%)	21.9
Rfree (%)	32.6
R.m.s.d. bonds (Å)	0.029
R.m.s.d. angles (°)	2.78
Average B factor (Å2)
RXRβ/LXRα/GRIP1 peptides	26.5/36.7/54.3
MPA/T-17/water	25.3/48.8/22.8
Ramachandran (%)
Favored	83.7
Additional	12.6
Generous	3.7
Disallowed	0

R.m.s.d., root mean square deviation from ideal geometry.