<p>Members of this protein family are the Fe-S protein, NrfC, of the cytochrome c nitrite reductase system for which the pentaheme cytochrome c protein, NrfB (family <db_xref db="INTERPRO" dbkey="IPR017564"/>) is an unambiguous marker. Members of this protein family show similarity to other ferredoxin-like proteins, including a subunit of polysulphide reductase.</p> Cytochrome c nitrite reductase, Fe-S protein