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Structure of mitochondrial complex I from Polytomella sp. Above: CryoEM density; below: atomic model. Color scheme for the 14 conserved core subunits, accessory subunits and the subunits of the carbonic anhydrase and bridge domains as in Figure 1. Insets: γ-carbonic anhydrase (γCA) and bridge domains. Unknown (unk) refers to two unassigned densities in the membrane arm with limited amino acid sequence information. For EM statistics, see Supplemental Tables S3, S5, and S7.
