1	XCC	Fe(4)-ni(1)-S(4) cluster	1.000
2	RQM	Fe(3)-ni(1)-S(4) cluster	0.800
3	F3S	Fe3-s4 cluster	0.778
4	SF3	Fe4-s3 cluster	0.778
5	BF8	Fe(4)-ni(1)-S(5) cluster with oxygen	0.727
6	NFS	Fe(4)-ni(1)-S(5) cluster	0.727
7	0KA	Silver/iron/sulfur cluster	0.700
8	9S8	Non-cubane [4Fe-4S]-cluster	0.700
9	ER2	Fe4s4	0.700
10	MSK	Broken Fe4S4 cluster	0.700
11	S3F	Oxidized [fe4-s3] cluster	0.700
12	SF4	Iron/sulfur cluster	0.700
13	WCC	Fe(3)-ni(1)-S(4) cluster	0.700
14	ZKP	Fe3-s4 methylated cluster	0.700