What does trypsin mean?
Trypsin is a digestive enzyme made by the pancreas and released into the small intestine, where it cuts large protein molecules into smaller peptides. The pancreas initially produces it in an inactive form called trypsinogen; digestive signals activate trypsinogen into trypsin. Trypsin works by cleaving bonds between amino acids in proteins, and its products are then broken down further by other enzymes. In laboratories, trypsin is also used to detach cells from culture plates because its ability to digest proteins can weaken cellular attachments. The word belongs mainly to biochemistry, medicine, nutrition, and laboratory science, where it has a precise enzymatic meaning rather than a general association with digestion. Although often discussed alongside other digestive enzymes, trypsin is especially important because it serves as the central protein-digesting enzyme in the small intestine.
nounA serine protease enzyme produced by the pancreas that hydrolyzes proteins into smaller peptides during digestion. It is released in the small intestine as active trypsin, after activation from its precursor trypsinogen.
- A pancreatic digestive enzyme that hydrolyzes proteins into peptides.
"Trypsin breaks down dietary proteins into peptides that can then be further digested and absorbed."
"Trypsin is secreted into the small intestine, where it helps break down dietary proteins."
"In the laboratory, trypsin is commonly used to detach cells from culture surfaces."
The plural is rare; singular trypsin is normally used even when discussing the enzyme in different organisms, preparations, or experimental samples.
"The researchers compared the activity of trypsins from different sources."
Trypsin is the pancreatic enzyme that turns the protein in your dinner into smaller pieces your body can use.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does trypsin come from?
Trypsin was named in the 19th century from Greek tryptein, meaning “to rub” or “to grind,” combined with the enzyme-name ending -in. The name reflects its protein-digesting action and also connects it with related forms such as tryptic and trypsinogen. The same Greek root appears in words including tryptophan and tryptamine, which have chemical or biochemical senses unrelated to pancreatic digestion.
Related word forms
How trypsin is actually used
Primarily a technical term in biology, biochemistry, medicine, and food science. Outside specialist contexts, it is uncommon and is normally used for the enzyme itself rather than as a general term for digestion.
Easily confused with trypsin
Trypsinogen is the inactive precursor produced by the pancreas, whereas trypsin is the active enzyme formed from it.
Tryptophan is an essential amino acid found in proteins, while trypsin is the enzyme that helps digest those proteins.