ELECTRON TRANSPORT, CASP TARGET, RIESKE FERREDOXIN, [2FE-2S] CLUSTER, PROTEIN STRUCTURE INITIATIVE, PSI, CENTER FOR EUKARYOTIC STRUCTURAL GENOMICS, CESG, 2FE-2S, ALTERNATIVE SPLICING, IRON, IRON- SULFUR, METAL-BINDING CRYSTAL STRUCTURE OF A SOLUBLE RIESKE FERREDOXIN FROM MUS MUSCULUS 3D89