Table 2. Crystallization screening and refinement conditions for X. citri PhoX in the absence and presence of phosphate.

The best crystals obtained after refinement are shown in Fig. 1 ▶.

Sample	Protein concentration (mgml1)	Screening	Refinement	Crystals	Resolution after refinement ()
PhoX + sodium phosphate	10	25% PEG 3350, 200mM sodium iodide, 100mM bis-tris pH 5.5	20% PEG 3350, 200mM sodium iodide	Fig. 1 ▶(a)	3.0
PhoX	8	20% PEG 3350, 200mM sodium iodide	17% PEG 3350, 200mM sodium iodide	Fig. 1 ▶ (b)	5.0
PhoX	10	20% PEG 3350, 200mM sodium iodide	17% PEG 3350, 250mM sodium iodide	Fig. 1 ▶(c)	6.0
PhoX + sodium phosphate	15	20% PEG 3350, 200mM sodium iodide	17% PEG 3350, 250mM sodium iodide	Fig. 1 ▶(d)	2.9
PhoX + sodium phosphate	15	17% PEG 3350, 250mM sodium iodide	15% PEG 3350, 250mM sodium iodide	Fig. 1 ▶(e)	3.0