Table 1.

Data collection and refinement statistics

	Lys11-linked diubiquitin
Data collection
Space group	P2221
Cell dimensions
a, b, c (Å)	79.23, 79.96, 221.23
α, β, γ (°)	90, 90, 90
Resolution (Å)	24.92 – 2.20 (2.32 – 2.20)*
R merge	0.106 (0.485)
I / σI	6.0 (2.0)
Completeness (%)	98.3 (99.7)
Redundancy	3.1 (3.0)
Refinement
Resolution (Å)	24.92 – 2.20
No. reflections	65986
Rwork / Rfree	0.205 / 0.252
No. atoms
Protein	7255 (12 ubiquitin molecules)
Ligand/ion	111
Water	654
B-factors
Protein	30.1
Ligand/ion	41.8
Water	34.4
R.m.s. deviations
Bond lengths (Å)	0.005
Bond angles (°)	0.978

^*Values in parentheses are for highest-resolution shell.