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Structures of full complex III dimer (cIII2) and of isolated UQCRFS1 (of only one of the monomers), from bovine (PDB ID: 1BGY) and chicken (PDB ID: 3H1J). The arrows indicate the presence of the UQCRFS1 fragments in the cavity between UQCRC1 and UQCRC2. Images were generated with MacPyMol.
