<p>The N-terminal domain of the ubiquinol-cytochrome c reductase iron-sulphur subunit adopts a structure consisting of many antiparallel beta sheets, with few alpha helices, in a non-globular arrangement. They are required for proper functioning of the respiratory chain [<cite idref="PUB00014307"/>]. </p> Ubiquinol-cytochrome c reductase 8kDa, N-terminal