ApoC, or Apolipoprotein C, refers to a group of proteins that play a crucial role in lipid metabolism. These proteins are primarily found in the bloodstream and are involved in the transport of lipids, such as triglycerides and cholesterol. ApoC proteins help regulate the activity of enzymes that break down fats, influencing how the body processes and utilizes these essential nutrients. There are several types of ApoC, including ApoC-I, ApoC-II, and ApoC-III, each with distinct functions. For instance, ApoC-II activates lipoprotein lipase, an enzyme that helps clear triglycerides from the blood, while ApoC-III inhibits this process. Understanding ApoC is important for studying conditions like cardiovascular disease and metabolic disorders.