Table 1. Crystallographic Collection and Refinement Statistics.

STRUCTURE	D118N/Amino Acid	S228A/Leucine	S228A/Amino Acid	S228A/LPA	M180A	M180A/LPA	M180A/Leucine
PDB ID	3B3T	3B3W	3B3V	3B7I	3B35	3B3C	3B3S
Space group	P6122	P6122	P6122	P6122	P6122	P6122	P6122
Unit cell parameters, Å	a=b=109.3 c = 91.1	a=b=110.6 c = 91.6	a=b=109.3 c = 91.0	a=b=109.9 c = 91.1	a=b=109.2 c = 91.0	a=b=108.2 c = 97.2	a=b=109. c = 91.0
Resolution	42–1.17	15–1.75	22–1.22	20–1.75	41.0–1.15	30.6–1.46	17.2–1.18
Number of Unique Reflections	102,258	30,654	92,234	32,789	122,065	54,941	102,599
Rmerge, %a	7.5 (56.8)	8.8 (66.2)	9.3 (67.1)	12.9 (65.9)	5.9 (78.8)	6.2 (50.2)	8.7 (55.0)
Completeness %	95.3 (91.3)	92.8 (93.1)	97.7 (81.4)	98.6 (98.1)	89.5 (95.1)	99.7 (98.9)	99.8 (98.4)
Cutoff I/σ(I)	2.1	2.9	1.52	2.2	2.0	2.1	2.4
B-factor model	anisotropic	isotropic	anisotropic	isotropic	anisotropic	isotropic	anisotropic
Rwork, %	14.16	19.4	14.91	17.65	14.9	19.6	16.8
Rfree, %	16.09	23.4	17.05	20.87	16.6	22.6	19.6
<B>	11.3	27.4	19.6	14.1	14.6	23.6	15.5
DPI, Åb (standard positional uncertainty, σ (x, Bave)	0.03	0.12	0.04	0.10	0.03	0.07	0.04
Estimated minimal error, Åb	0.01	0.03	0.01	0.03	0.01	0.01	0.02
No. of protein residues	291	291	291	291	291	291	291
No. of waters	303	263	221	250	357	278	308

^aValues in highest resolution shell reported in parenthesis.

^bValues calculated by SFCHECK.