As cellular power plants, mitochondria are the subcellular organelles found in most eukaryotic cells. They contain the enzymes for tricarboxylic acid cycle and protein complexes for electron transport chain. Mitochondrial dysfunction has been implicated in many human diseases relating to cancer, diabetes, cardiac failures and neurodegenerative disorders. Therefore, there is an increasing need for an effective method to isolate intact and functional mitochondria from fresh or frozen tissues and cultured cells. ScienCell's Mitochondria Isolation Kit has been designed to provide the optimal yield of intact and enzymatically active mitochondria.The basic principles of mitochondria isolation using this kit include three stages:1) mechanical rupturing of tissues or cells2) removing cellular debris and nuclei by low speed centrifugation and3) harvesting mitochondria by high speed centrifugation.