Table 2. Crystallographic data collection and refinement statistics.
| Data collection | |
| Space group | P321 |
| Cell dimensions | |
| a, b, c (Å) | 102.85, 102.85, 60.00 |
| α, β, γ (°) | 90, 90, 120 |
| Resolution (Å) | 60–2.5 (2.63–2.5)* |
| R merge (%) | 15.4 (94.9)* |
| I/σI | 9.1 (3.0)* |
| CC1/2 | 0.99 (0.64)* |
| Completeness (%) | 98.7 (97.5)* |
| Multiplicity | 5.4 (5.4)* |
| Refinement | |
| Resolution | 60–2.5 Å |
| No. reflections | 12817 (623**) |
| R work/R free | 19.16%/23.72% |
| Number of atoms | |
| Protein and retinal | 1827 |
| Water | 19 |
| Lipid fragments | 188 |
| Sulfate ions | 10 |
| Average B-factor (Å2) | |
| Protein and retinal | 38.8 |
| Water | 40.8 |
| Lipid fragments | 53.5 |
| Sulfate ions | 63.9 |
| R.m.s. deviations | |
| Bond lengths | 0.010 Å |
| Bond angles | 1.7° |
* Values in parentheses are for the highest-resolution shell.
** Number of reflections that are not used for refinement (free reflections).