Aminopeptidases are enzymes that play a crucial role in protein digestion. They work by breaking down proteins into smaller peptides and amino acids by removing amino acids from the amino end of the protein chain. This process is essential for nutrient absorption in the body. These enzymes are found in various organisms, including humans, where they are primarily located in the small intestine. Aminopeptidases are important for maintaining proper metabolic functions and are involved in various biological processes, including the regulation of hormones and the immune response.