The molecule is a 7Fe-V-9S-X-homocitryl cluster, the structure of which is assumed to be analogous to the 7Fe-Mo-9S-X-homocitryl cluster. The identity of the X atom is not known, possibly carbon or oxygen. It has a role as a cofactor.
azanide;3-carboxy-3-hydroxyhexanedioate;iron;sulfanide;vanadium