Table 2. Crystallization.

Method	Vapour diffusion
Plate type	Hanging drop
Temperature (K)	293
Protein concentration (mg ml−1)	20
Buffer composition of protein solution	25 mM Tris–HCl pH 8.0, 100 mM NaCl
Composition of reservoir solution	0.1 M bis-tris pH 5.5, 20% PEG 3350
Volume and ratio of drop	2 µl, 1:1
Volume of reservoir (ml)	1