1	WCC	Fe(3)-ni(1)-S(4) cluster	1.000
2	F3S	Fe3-s4 cluster	0.875
3	ER2	Fe4s4	0.778
4	MSK	Broken Fe4S4 cluster	0.778
5	SF4	Iron/sulfur cluster	0.778
6	ZKP	Fe3-s4 methylated cluster	0.778
7	Q46	Fe4 H s5	0.700
8	RQM	Fe(3)-ni(1)-S(4) cluster	0.700
9	XCC	Fe(4)-ni(1)-S(4) cluster	0.700