Table 1.

Basic data collection and processing statistics for YckF crystals

Number of amino acid residues/methionines 185/9
Number of molecules in the asymmetric unit 2
Crystal lattice
Native	P6522 a = b = 72.08, c = 245.56Å			α = β = 90°	γ = 120°
Se-Met	P6522 a = b = 72.48, c = 244.87Å			α = β = 90°	γ = 120°
	Crystal 1 (Se-Met)			Crystal 2 (native)
	Inflection point	Peak	Remote	Low resolution	High resolution
Energy (keV)	12.65835a	12.65977a	13.000	13.100	13.100
Wavelength (Å)	0.97947	0.97936	0.95373	0.94644	0.94644
Resolution (Å)	50–2.5	50–2.61	50–2.6	50–3.2	4–1.95
No. of observations	559 946	46 1026	501 104	64 730	262 698
Uniqueb reflections	24913	22082	22 153	6880	25 054
Completeness (%)c	99.9 (100)	99.9 (100)	99.9 (100)	99.9 (100)	99.9 (100)
I/σ(I)c	50.8 (8.3)	45.7 (7.7)	48.1 (6.3)	50.5 (22.1)	31.6 (5.3)
Rsymc	0.068 (0.513)	0.074 (0.483)	0.082 (0.654)	0.039 (0.098)	0.072 (0.468)
Rmerge between low- and high-resolution passes on native crystals					0.035

^aEnergy deviation from usual values of Se absorption edge reflect calibration of the monochromator at the time of the experiment.

^bBijvoet pairs for scaling the MAD data sets were kept separately.

^cIn the last resolution shell.