American Society for Cell Biology, Molecular Biology of the Cell, 13(26), p. 2385-2401
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Twin Cx9C proteins constitute a large protein family in the intermembrane space of mitochondria. One of these proteins, Cox19, serves as interaction partner of the copper transfer protein Cox11. The results suggest that a redox-regulated interplay of Cox19 and Cox11 is critical for copper insertion into cytochrome c oxidase.