(c).

Phasing statistics.

	Centric		Acentric		All
Resolution (Å)	FOM‡	Phasing power§	FOM‡	Phasing power§	FOM‡	Phasing power§
50–2.5 (26531 reflections)	0.799	2.261	0.613	2.099	0.620	2.106

^† R _merge = , where I_j is the intensity of the measured reflection and I_m is the mean intensity of all symmetry-related reflections.

^‡Figure of merit from MAD phasing.

^§Phasing power = F _H/E _r.m.s., where F _H is the heavy-atom structure factor and E _r.m.s. is the residual lack of closure.