Table 2. Crystallographic refinement of heavy-atom sites.

	Native (Fe)		NaI		CsCl
	Occupancy	B (Å2)	Occupancy†	B (Å2)	Occupancy†	B (Å2)
Protein	1.00	48	1.00	40	1.00	46
Fe	1.00	26	1.00	21	1.00	28
Site 1			0.97	48	0.34	52
Site 2			0.71	50	0.30	52
Site 3			0.68	53	0.26	63
Site 4			0.65	53	0.21	52
Site 5			0.62	49	0.20	60
Site 6			0.52	53
Site 7			0.52	49
Site 8			0.49	51
Site 9			0.47	57
Site 10			0.47	53
Site 11			0.46	58
Site 12			0.42	60
Site 13			0.37	57
Site 14			0.22	58

^†Occupancy and B factors are correlated (see §2.6).