1	Q46	Fe4 H s5	1.000
2	SF4	Iron/sulfur cluster	0.889
3	F3S	Fe3-s4 cluster	0.778
4	F4S	Fe4-s3 cluster	0.778
5	0KA	Silver/iron/sulfur cluster	0.700
6	9S8	Non-cubane [4Fe-4S]-cluster	0.700
7	ER2	Fe4s4	0.700
8	MSK	Broken Fe4S4 cluster	0.700
9	WCC	Fe(3)-ni(1)-S(4) cluster	0.700
10	ZKP	Fe3-s4 methylated cluster	0.700