Trypsin ELISA kits are assays designed to measure levels of the protein trypsin in biological samples, such as plasma, serum, culture extracts, and cell lysates. Trypsin is a type of serine protease enzyme that is secreted by the pancreas as trypsinogen. Tryptic digestion is a necessary step in protein absorption, helping to facilitate absorption in the small intestine. As a specific marker for pancreatic activity, changes in trypsin levels are indicative of the pancreas' physiological state. Three human isoforms exist for trypsin: PRSS1, PRSS2, and PRSS3. Click on the ELISA products below and visit the supplier for more information, including assay sensitivity and target specificity.