Cytochrome C is a small heme protein found in the mitochondria of eukaryotic cells. It plays a crucial role in the electron transport chain, which is essential for cellular respiration. By transferring electrons between Complex III and Complex IV, it helps generate adenosine triphosphate (ATP), the primary energy currency of the cell. In addition to its role in energy production, Cytochrome C is involved in apoptosis, or programmed cell death. When cells undergo stress or damage, Cytochrome C can be released from the mitochondria, triggering a cascade of events that lead to cell death, which is important for maintaining healthy tissues and preventing cancer.