1	CUV	Fe(4)-ni(1)-S(4) cluster, oxidized	1.000
2	8JU	Fe4-s4-O cluster	0.800
3	9S8	Non-cubane [4Fe-4S]-cluster	0.700
4	ER2	Fe4s4	0.700
5	MSK	Broken Fe4S4 cluster	0.700