Table 1. Data statistics for C49S HpAhpC.

Values in parentheses are for the highest resolution shell.

	Decameric form	Monomeric form
Space group	C222	C2
Unit-cell parameters (Å, °)	a = 257.5, b = 417.5, c = 95.6	a = 245.8, b = 140.7, c = 189.5, β = 127
No. of chains in ASU	20†	20
VM (Å3 Da−1)	2.3	2.5
Solvent content (%)	46.4	50.8
Resolution (Å)	50–2.8 (2.9–2.8)	50–2.25 (2.33–2.25)
No. of reflections	124746 (12177)	242042 (23739)
Completeness (%)	98.1 (96.8)	99.3 (97.7)
Rmerge‡ (%)	26.7 (47.7)	11.3 (15.2)
Redundancy	5.2 (4.2)	5.9 (4.6)
〈I/σ(I)〉	3.2 (1.6)	13.2 (9.4)

^†Number of molecules estimated according to specific volume calculation.

^‡ R _merge = , where I _i(hkl) is the ith intensity measurement of reflection hkl, including symmetry-related reflections, and 〈I(hkl)〉 is its average