1	9S8	Non-cubane [4Fe-4S]-cluster	1.000
2	SF3	Fe4-s3 cluster	0.875
3	ER2	Fe4s4	0.778
4	MSK	Broken Fe4S4 cluster	0.778
5	S3F	Oxidized [fe4-s3] cluster	0.778
6	8JU	Fe4-s4-O cluster	0.700
7	CUV	Fe(4)-ni(1)-S(4) cluster, oxidized	0.700
8	Q46	Fe4 H s5	0.700
9	RQM	Fe(3)-ni(1)-S(4) cluster	0.700
10	XCC	Fe(4)-ni(1)-S(4) cluster	0.700