Table 1. X-ray data-collection statistics.

Values in parentheses are for the outer shell.

Resolution (Å)	50–1.74 (1.80–1.74)
Wavelength (Å)	1.0
Data-collection temperature (K)	110
No. of observed reflections	1018072
No. of unique reflections	55192
Completeness (%)	99.1 (93.5)
Mean I/σ(I)	13.9 (2.14)
Rsym† (%)	12.0 (83.1)

^† R _sym = .