Fig. 4.

The plant respiratory chain supercomplex. (A) Subtomogram average (transparent gray) of the A. officinalis I₁III₂ supercomplex with fitted atomic models. Red/orange, complex III₂ (PDB ID code 1BCC); blue, complex I (PDB ID code 4WZ7); yellow, γ-carbonic anhydrase (PDB ID code 1QRE). (B) Atomic model of complex I and γ-carbonic anhydrase (CA, yellow) and complex I subunits likely to interact with it. Subunits are labeled as in bovine complex I. (Scale bar: 5 nm.)