4.2.1.114	Fe2+	required, in a Fe-S cluster	746978	
4.2.1.114	Fe2+	the enzyme contains an iron-sulfur center, reconstitution of the purified recombinant apoenzyme with iron-sulfur, overview	693150	
4.2.1.114	Iron-sulfur cluster	the structure of the protein has unbound Fe-S clusters and contains a fourth cysteine in the active site	726596	
4.2.1.114	Mg2+	required for the hydratase reaction, not for the hydrolase reaction	693150