Table I. Diffraction data and refinement statistics.

Data set	Native	Os 1.13987 Å	Os 1.139205 Å	Os 1.04591 Å	Au	Iodine
Space group	I222
Unit cell parameters
a	87.154
b	88.031
c	114.609
Resolution range	20–2.15	20–2.81	20–2.82	20–2.68	20–3.0	20–2.23
Total measurements	96 833	71 728	80 430	79 013	11 889	39 337
Unique reflections	23 553	18 594	19 651	21 720	3511	21 279
Completeness	0.976	0.90	0.95	0.81	0.78	95.3
Last shell	0.99	0.70	0.76	0.76		59.4
Anomalous completeness		0.75	0.84	0.75
Rsym	0.070	0.055	0.063	0.056	0.053	0.043
Last shell	0.249	0.184	0.175	0.483	0.109	0.336
Phasing: isomorphous acentric (centric)		0.57 (0.38)	0.59 (0.39)	0.64 (0.52)	0.52
Power: anomalous acentric		0.23	0.31	0.23
Figure of merit acentric (centric)	0.51 (0.24)
Protein atoms	2749
Solvent	464
Sulfate ions	3
Chloride ion	1
Refinement
Resolution	10.0–2.15
Reflections	23 353
R-factor	0.186
Rfree	0.231
Mean B-factor (bonded)	23.8 (1.72)
R.m.s.d. bonds	0.0090 Å
R.m.s.d. angles	1.54°