<p> This entry represents the TAT-signal region found in the iron-sulphur subunit of Ubiquinol-cytochrome C reductase (also known as the cytochrome bc1 complex). This enzymex is an oligomeric membrane protein complex that is a component of respiratory and photosynthetic electron transfer chains. It couples the transfer of electrons from ubiquinol to cytochrome c with the generation of a protein gradient across the membrane [<cite idref="PUB00024722"/>]. This entry is associated with <db_xref db="INTERPRO" dbkey="IPR017941"/>, <db_xref db="INTERPRO" dbkey="IPR004192"/> and <db_xref db="INTERPRO" dbkey="IPR015248"/>. </p> Ubiquitinol-cytochrome C reductase, Fe-S subunit, TAT signal