Table III. Refinement statistics.

	APO	ADP
Residues	1: 1–320;	A: 1–63; 68–320
	2: 1–211, 217–319	B: 1–63; 68–320
Water, cofactor	282	370, Mg-ADP
Resolution (Å)	2.3	2.0
Twinning fractiona		0.50
R-factor, Rfreeb	0.217, 0.266	0.221, 0.252
B averagec (Å2)	42.7	37.6
Geometry bonds (Å)/angles (°)d	0.006, 1.193	0.008, 1.381
Ramachandrane (%)	88.5/0.0	90.8/0.0
PDB IDf	1MWK	1MWM

^aTwinning fraction as used in refinement, operator h, –k, –l.

^bFive per cent of reflections were randomly selected for determination of the free R-factor (taking twinning into account where appropriate), prior to any refinement.

^cTemperature factors averaged for all atoms.

^dR.m.s.ds from ideal geometry for bond lengths and restraint angles (Engh and Huber, 1991).

^ePercentage of residues in the ‘most favoured region’ of the Ramachandran plot and percentage of outliers (PROCHECK; Laskowski et al., 1993).

^fPDB identifiers for coordinates and structure factors, respectively.