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Figure 3
Superimposition of the C2-acetyl group of BChl PB in the WT RC (pale yellow) and in F(M197)H RC (light blue). Views of this group are shown along the plane of BChl PB (a) and perpendicular to the M197 imidazole ring (b).

IUCrJ
Volume 9| Part 2| March 2022| Pages 261-271
ISSN: 2052-2525
https://doi.org/10.1107/S2052252521013178