TABLE 2.

Refinement and model details^a

Parameter	Value
Resolution limits (Å)	25.0-1.9
R factor (Rfree) (%)	19.0 (22.0)
No. of reflections	52,727 (5,344)
Model details
No. of protein atoms	3,384
No. of other molecules, ions	3 tartrate ions, 3 glyoxalate
No. of water molecules	276
Root mean square deviation from standard geometry
Bond length (Å)	0.005
Bond angle (°)	1.3
Avg B factor (Å2)
Protein (A, B, C chains)	14.5, 17.3, 13.4
Ligands (tartrate, glyoxalate)	22.0, 29.1
Water	21.7
% of residues in most-favored regions of Ramachandran plot	89.4

^aSee Table 1, footnote a.