Table 1. Data-collection statistics.

Values in parentheses are for the highest resolution shell.

Crystal	Apo-GpdQ	Zn-GpdQ	Co-GpdQ
Space group	P213	P213	P213
Unit-cell parameter a (Å)	164.13	164.26	164.46
Temperature (K)	100	100	100
Wavelength (Å)	0.97929	1.28269	0.97929
Resolution (Å)	50–3.0 (3.19–3.0)	50–2.9 (3.08–2.9)	50–3.0 (3.19–3.0)
Unique reflections	29709	32293	29959
Redundancy	6.8 (6.4)	12.5 (11.2)	14.0 (12.3)
〈I/σ(I)〉	19.7 (2.8)	32.2 (4.6)	34.3 (4.6)
Completeness	99.9 (99.9)	100 (100)	100 (100)
Rsym (%)	11.2 (50.7)	7.7 (43.6)	7.3 (42.4)