1	F3S	Fe3-s4 cluster	1.000
2	0KA	Silver/iron/sulfur cluster	0.875
3	ER2	Fe4s4	0.875
4	MSK	Broken Fe4S4 cluster	0.875
5	SF4	Iron/sulfur cluster	0.875
6	WCC	Fe(3)-ni(1)-S(4) cluster	0.875
7	ZKP	Fe3-s4 methylated cluster	0.875
8	Q46	Fe4 H s5	0.778
9	RQM	Fe(3)-ni(1)-S(4) cluster	0.778
10	XCC	Fe(4)-ni(1)-S(4) cluster	0.778
11	F4S	Fe4-s3 cluster	0.750
12	SF3	Fe4-s3 cluster	0.750
13	FS0	Fe2/s3 cluster	0.714
14	BF8	Fe(4)-ni(1)-S(5) cluster with oxygen	0.700
15	NFS	Fe(4)-ni(1)-S(5) cluster	0.700