1	0KA	Silver/iron/sulfur cluster	1.000
2	F3S	Fe3-s4 cluster	0.875
3	MSK	Broken Fe4S4 cluster	0.778
4	SF4	Iron/sulfur cluster	0.778
5	ZKP	Fe3-s4 methylated cluster	0.778
6	Q46	Fe4 H s5	0.700
7	RQM	Fe(3)-ni(1)-S(4) cluster	0.700
8	XCC	Fe(4)-ni(1)-S(4) cluster	0.700