Figure 3: Comparison of the RC vir SFX structure with an earlier structure.
From: Structure of a photosynthetic reaction centre determined by serial femtosecond crystallography
(a) Superposition in stereo of the SFX crystal structure (brown) upon the Laue diffraction RCvir structure (white, pdb entry 2X5U). Both structures were aligned on their 11 TM helices. Regions for which the coordinate changes are ≥1.0σ (calculated according to ref. 29, Supplementary Fig. S4) are marked in red and correspond to subtle backbone differences in subunits C and H. (b) Crystal packing of the LSP microcrystal form used in this SFX study. (c) Crystal packing of the LSP macrocrystal form (that is, larger crystals) used in other studies28,30. Crystal contacts differ between the microcrystal (space group P212121; a=57.9 Å; b=84.8 Å; c=384.3 Å) and macrocrystal (space group P21212; a=85 Å; b=139 Å; c=178 Å) forms.
