Table 2 Crystallographic statistics Data collection Space group P43212 Unit cell dimensions (Å) a = 48.14, b = 48.14, c = 81.20 Resolution range (Å)a 20–1.8 (1.9–1.8) Total observationsa 29,839 (3685) Unique reflectionsa 9015 (1252) Completeness (%)a 96.4 (94.2) Multiplicitya 3.3 (2.9) Rmerge (%)a 4.1 (39.4) I/σ(I)a 19.1 (3.3) 

 Refinement Number of reflections (working, test) 8556 (424) Rcryst/Rfree (%) 19.2/25.0 Total number of non-H atoms 744 Number of water molecules 59 rmsd from ideal bond length (Å) 0.016 rmsd from ideal bond angles (°) 1.7 Ramachandran plot (%)  Core region 96.3  Allowed region 3.7  Generously allowed region 0  Disallowed region 0 a Parentheses refer to final resolution shell.