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  2. Digestive enzyme - Wikipedia

    en.wikipedia.org/wiki/Digestive_enzyme

    The stomach plays a major role in digestion, both in a mechanical sense by mixing and crushing the food, and also in an enzymatic sense, by digesting it. The following are enzymes produced by the stomach and their respective function: Pepsin is the main gastric enzyme. It is produced in the stomach by gastric chief cells in its inactive form ...

  3. Pepsin - Wikipedia

    en.wikipedia.org/wiki/Pepsin

    Pepsin / ˈ p ɛ p s ɪ n / is an endopeptidase that breaks down proteins into smaller peptides and amino acids. It is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest the proteins in food. Pepsin is an aspartic protease, using a catalytic aspartate in its active site. [2]

  4. Stomach - Wikipedia

    en.wikipedia.org/wiki/Stomach

    The breakdown of protein begins in the stomach through the actions of hydrochloric acid, and the enzyme pepsin. The stomach can also produce gastric lipase, which can help digesting fat. The contents of the stomach are completely emptied into the duodenum within two to four hours after the meal is eaten.

  5. Digestion - Wikipedia

    en.wikipedia.org/wiki/Digestion

    Protein digestion occurs in the stomach and duodenum in which 3 main enzymes, pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas, break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids.

  6. Progastricsin - Wikipedia

    en.wikipedia.org/wiki/Progastricsin

    The encoded protein is a digestive enzyme that is produced in the stomach and constitutes a major component of the gastric mucosa. This protein is also secreted into the serum. This protein is synthesized as an inactive zymogen that includes a highly basic prosegment.

  7. Human digestive system - Wikipedia

    en.wikipedia.org/wiki/Human_digestive_system

    Pepsinogen is a precursor enzyme produced by the gastric chief cells, and gastric acid activates this to the enzyme pepsin which begins the digestion of proteins. As these two chemicals would damage the stomach wall, mucus is secreted by innumerable gastric glands in the stomach, to provide a slimy protective layer against the damaging effects ...