Table 2. Crystallization.

Method	Vapour diffusion, sitting drop
Plate type	Cryschem 24-well plate
Temperature (K)	293
Protein concentration (mg ml−1)	5
Buffer composition of protein solution	0.5 mM CQH, 5%(v/v) DMSO, 250 mM sodium acetate pH 5.5
Composition of reservoir solution	20%(w/v) PEG MME 5000, 0.2 M sodium sulfate
Volume and ratio of drop	1 µl HLE–CQH solution:0.5 µl reservoir solution
Volume of reservoir (µl)	200