What is the definition of mitochondria​

an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner part being folded inwards to form layers (cristae)

Mitochondria are membrane bound cell organelles that generate most of the chemical energy needed to power the cells biochemical reaction.

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this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.