a second type of [ 2fe-2s ] cluster , called center s-2 , that has been proposed to be present in purified preparations of succinate dehydrogenase and isolated complex ii ( ohnishi , t. , winter , d.b. , lim , j. and king , t.e . ( 1973 ) biochem . biophys . res . commun . 53 , 231 -- 237 ) is an artifact introduced by the purification procedure .
C0038615
succinate dehydrogenase
C0283592
complex