Fe
contains 4 irons per polypeptide
Fe2+
a heme containing enzyme, HemN contains a [4Fe-4S] cluster
Fe2+
HemN binds a (4Fe-4S) cluster
Fe2+
HemN contains a catalytically essential [4Fe-4S] cluster that transfers an electron to bound S-adenosyl-L-methionine, thereby producing methionine and a 5'-deoxyadenosyl radical
Fe2+
HemN is a radical S-adenosyl-L-methionine and [4Fe-4S] containing enzyme
Fe2+
[4Fe-4S]1+ cluster and [3Fe-4S]1+ cluster