ID 2Fe-2S. AC KW-0001 DE Protein which contains at least one 2Fe-2S iron-sulfur cluster: 2 iron DE atoms complexed to 2 inorganic sulfides and 4 sulfur atoms of DE cysteines from the protein. SY Fe2S2; [2Fe-2S] cluster; [Fe2S2] cluster; Fe2/S2 (inorganic) cluster; SY Di-mu-sulfido-diiron; 2 iron, 2 sulfur cluster binding. GO GO:0051537; 2 iron, 2 sulfur cluster binding HI Ligand: Iron; Iron-sulfur; 2Fe-2S. HI Ligand: Metal-binding; 2Fe-2S. CA Ligand. // ID 3D-structure. AC KW-0002 DE Protein, or part of a protein, whose three-dimensional structure has DE been resolved experimentally (for example by X-ray crystallography or DE NMR spectroscopy) and whose coordinates are available in the PDB DE database. Can also be used for theoretical models. HI Technical term: 3D-structure. CA Technical term. // ID 3Fe-4S. AC KW-0003 DE Protein which contains at least one 3Fe-4S iron-sulfur cluster: 3 iron DE atoms complexed to 4 inorganic sulfides and 3 sulfur atoms of DE cysteines from the protein. In a number of iron-sulfur proteins, the DE 4Fe-4S cluster can be reversibly converted by oxidation and loss of DE one iron ion to a 3Fe-4S cluster. GO GO:0051538; 3 iron, 4 sulfur cluster binding HI Ligand: Iron; Iron-sulfur; 3Fe-4S. HI Ligand: Metal-binding; 3Fe-4S. CA Ligand. //