Table 1. Crystallization conditions and cryo protection / washing procedure.

Crystal form	Reservoir solution (RS)	Cryo/washing solution
Trigonal	100 mM sodium acetate pH 4.6, 2.2 M calcium chloride	-
Orthorhombic (Wash I)	100 mM sodium acetate pH 4.6, 20%(w/v) PEG 6000	RS + 10% (v/v) PEG 300
Orthorhombic (Wash II)	100 mM tri-Sodium citrate pH 5.6, 1.0 M Ammonium phosphate	RS + 20% (v/v) PEG 300
Hexagonal	64 mM Sodium citrate pH 7.0, 100 mM HEPES pH 7.0, 10%(w/v) PEG 5000 MME	RS + 20% (v/v) PEG 300