epr spectra at 9 ghz and 83 degrees k of nadh-reduced anaerobic beef-heart submitochondrial particles , prepared from mitochondria by sonication and centrifugation , contain a signal ( gz equals to 2.01 , gy equals to 1.94 , gx equals to 1.89 ) due to an iron-sulphur center of the mitochondrial outer membrane .
C0026237
mitochondria
C0230839
mitochondrial outer