iron-sulfur cluster binding 3 iron, 4 sulfur cluster binding molecular_function iron-sulfur cluster 3Fe-4S binding 3 iron, 4 sulphur cluster binding triiron tetrasulphide cluster binding Binding to a 3 iron, 4 sulfur (3Fe-4S) cluster; this cluster consists of three iron atoms, with the inorganic sulfur atoms found between the irons and acting as bridging ligands. It is essentially a 4Fe-4S cluster with one iron missing. 3Fe-4S cluster binding iron-sulphur cluster 3Fe-4S binding GO:0051538 3 Fe 4 S cluster binding triiron tetrasulfide cluster binding