Table 2. Crystallization.

Method	Sitting-drop vapour diffusion
Plate type	Greiner Bio-One
Temperature (K)	294
Protein concentration (mg ml−1)	45
Buffer composition of protein solution	20 mM Tris–HCl pH 7.5, 200 mM NaCl, 1 mM TCEP
Composition of reservoir solution	30%(w/v) PEG 400, 100 mM sodium acetate/acetic acid pH 4.5, 200 mM calcium acetate
Volume and ratio of drop	200 nl; 1:1
Volume of reservoir (µl)	90