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Three-dimensional representations of RC-LH1 membrane patches prepared using a sub-CMC concentration β-DDM detergent, showing empty LH1 rings. A, a membrane patch of monomeric RC-LH1 complexes where most of the H-subunits are missing revealing the L- and M-subunits; two clear empty LH1 rings are denoted by the red arrows. B, a less well resolved patch of RC-LH1 complexes showing a small, ∼8-nm-diameter, empty LH1 ring (red arrow).
