Description; Application; The specific sites and extent of oxidation in horse cytochrome c treated with H2O2 and UV were characterized. It was suggested that the state of these sites could be used as a biomarker for the oxidative environment in a cell.; Packaging; 1, 2, 5 g in glass bottle; 50, 100, 250, 500 mg in glass bottle; Biochem/physiol Actions; Cytochrome c is primarily known as an electron-carrying mitochondrial protein. The transition of cytochrome c between the ferrous and ferric states within the cell makes it an efficient biological electron-transporter and it plays a vital role in cellular oxidations in both plants and animals. It is generally regarded as a universal catalyst of respiration, forming an essential electron-bridge between the respirable substrates and oxygen; Preparation Note; Prepared using TCA.; Other Notes; View more information on cytochrome c and electron transport at www.sigma-aldrich.com/enzymeexplorer.