Table 2. Crystallization conditions.

Method	Hanging drop
Plate type	EasyXtal 15-Well Tool (Qiagen)
Temperature (°C)	18
Protein concentration (mg ml−1)	10
Buffer composition of protein solution	20 mM Tris–HCl pH 7.6, 50 mM NaCl
Composition of reservoir solution	22% PEG 3350, 0.22 M magnesium formate dihydrate
Volume and ratio of drop	2 µl, 1:1
Volume of reservoir (µl)	500