Term Name:	iron-sulfur-iron cofactor
Synonyms:	[8Fe-9S-C-homocitryl] cluster
Definition:	P-cluster from Mo-independent nitrogenases, deprotonated to pH 7.3. Unfortunately, there are no structures available, and one of the O ligands of Fe has actually not been confirmed (hence the X in the name)
Ontology:	ChEBI [CHEBI:60504]  ( EBI )