Trypsin is an enzyme critical in the digestive process, primarily involved in protein digestion. Produced in the pancreas and secreted into the small intestine, it exists initially as an inactive precursor, trypsinogen. Upon entering the small intestine, trypsinogen is activated into trypsin by another enzyme, enterokinase, found in the duodenum. It then breaks down long chains of amino acids, the building blocks of proteins, into smaller peptides and amino acids, facilitating their absorption and utilization by the body. As a serine protease from the PA clan superfamily, it’s function and activity are essential in maintaining normal digestive processes and overall protein metabolism.