Table 1.

Statistics of intensity data collection

Crystal	IO10	IO20	IO80
O2 exposure periods (min)	5–10	20	45–90
Beam lines		BL44XU
Beam sizes (μm)		50 (v) × 30 (h)
Space groups		P212121
Cell constants (Å)
A	181.77	181.44	181.67
B	203.30	203.09	203.41
C	177.57	177.79	177.67
Number of crystals	10	6	12
Number of images	648	560	720
Resolution (Å)	137.0–1.74 (1.76–1.74)	137.0–1.84 (1.86–1.84)	137.0–1.76 (1.78–1.76)
Observed reflections	5,752,786	4,113,495	6,825,118
Independent reflection	663,784 (16,459)	561,788 (13,951)	644,860 (15,945)
Averaged redundancy	8.7 (6.7)	7.3 (5.8)	10.6 (7.8)
Completeness (%)	99.8 (99.9)	99.8 (99.8)	99.9 (99.9)
Rmerge	11.2 (>100.0)	9.60 (89.6)	10.2 (91.5)
Rpim	3.3 (36.2)	3.3 (40.0)	2.9 (34.7)
I/σ(I)	30.6 (1.5)	31.7 (4.4)	37.3 (3.9)

Numbers in parentheses are given for the highest resolution shells. F_o data of the fully reduced form in the original PDB file (PDB ID code 5B1B) were used in the present study, whose statistics are given in Table 2 of the previous paper (9).