Table 2.

Data collection statistics for native [23] and selenomethionine-labeled STP. Values in parentheses are for the highest resolution shell.

	Native	Selenomethionine
Space group	P21212	P212121
Wavelength (Å)	0.933	0.97935
Unit-cell parameters (Å)	a = 91.8, b = 139.0, c = 86.7	a = 49.1, b = 74.9, c = 137.3
Resolution (Å)	20–2.65 (2.7–2.65)	20–2.5 (2.60–2.50)
Reflections measured	169847 (7368)	160419 (18194)
Unique reflections	32767 (1731)	33057 (3688)
Completeness (%)	99.5 (97.5)	97.8 (98.1)
Redundancy	5.2 (4.3)	4.9 (4.9)
I/σ (I)	11.7 (3.7)	14.2 (3.2)
s-norm/s-ano	1.02 (1.04)	1.26 (1.00)
Rmerged-F a (%)	11.5 (43.7)	6.9 (49.8)

^aR_merged−F = Σ |A_I(h,P) − A_I(h,Q)| = /0.5 Σ (A_I(h,P)− A_I(h,Q)), where $A_I=\sqrt{I}$ if I ≥ 0 $A_I=-\sqrt{I}$ if I <0. P and Q are two subsets of data [25].