Table 2. Crystallization conditions.

Method	Sitting-drop vapour diffusion
Plate type	VDX plate
Temperature (K)	291
Protein concentration (mg ml−1)	5, 10
Buffer composition of protein solution	20 mM Tris–HCl pH 8.0, 50 mM NaCl
Composition of reservoir solution	0.2 M ammonium sulfate, 0.1 M Tris pH 8.5, 25%(w/v) polyethylene glycol 3350
Volume and ratio of drop	1:1
Volume of reservoir (µl)	160