Table I.

Summary of crystallographic analysis.

Data collection and processing
Space group	P4322
Cell dimensions
a, b, c (Å)	116.08, 116.08, 82.41
α, β, γ (°)	90, 90, 90
Rmerge	0.134 (0.694)
Mean I/σI	18.2 (3.5)
Total number of observations	205551 (28445)
Total number of unique observations	16014 (2294)
Completeness	99.9% (100%)
Redundancy	12.8 (12.4)
Refinement
Resolution limits (Å)	50-2.70
Reflection σ cutoff	I > 0 σ
Reflections (total / test)	15812 / 771
R / Rfree factors	0.226 / 0.282
Number of atoms	3197
RMSD bond length (Å)	0.008
RMSD bond angle (°)	1.38
Average B factor
MHC heavy chain (A, 2256 atoms)	49.27
Light chain β2m (B, 833 atoms)	47.47
Peptide (C, 66 atoms)	43.22
Water (42 atoms)	44.12
PROCHECK statistics
Residues in most favored regions	86.6%
Residues in additional allowed regions	12.8%
Residues in generously allowed regions	0.6%
Residues in disallowed regions	0.0%