An enzyme in the gastric juice which hydrolyses proteins to give smaller polypeptides; an endopeptidase.
An enzyme found in gastric juice that promotes the digestion of proteins.
A crystallizable proteinase (enzyme) that in an acidic medium digests (breaks down) most proteins to polypeptides. It is secreted by glands in the mucous membrane of the stomach of higher animals. In combination with dilute hydrochloric acid it is the chief active principle (component) of gastric juice. Also used in manufacturing peptones and in digesting gelatin for the recovery (i.e., recycling) of silver from photographic film.
An enzyme necessary for protein digestion.
An enzyme in the stomach which breaks down the proteins in food into peptones.
A protein digestive enzyme released by gastric cells as pepsinogen and activated by hydrochloric acid.
Enzyme, secreted by the stomach, that catalyzes the breakdown of proteins.
A digestive enzyme from the stomach that breaks down food protein into large protein molecules.
An enzyme that helps the body digest protein. Pepsin performs the first step in breaking down protein by splitting proteins in foods into smaller units called peptides. Pepsin functions only in acidic conditions. Hydrochloric acid (an acid produced by the stomach) converts pepsinogen in the stomach into pepsin, which helps break down protein into chemical components that enzymes can digest.
An enzyme in the stomach that begins the digestion of proteins by splitting them into peptone. It is produced by the action of hydrochloric acid on pepsinogen, which is secreted by the gastric glands. Once made, pepsin itself can act on pepsinogen to produce more pepsin.
An enzyme found in the gastric juice which digests proteins, converting them into peptides and amino acids. It is used in the preparation of predigested foods (peptonized foods), or, more frequently, taken orally after meals. Available as a white powder or liquid, it is prepared from the mucous membrane of cow, sheep, or pig stomachs.
The chief enzyme of gastric juice, which converts proteins into proteoses and peptones. It is formed by the chief cells of gastric glands and produces its maximum activity at a pH of 1.5 to 2. It is obtainable in granular form. In the presence of hydrochloric acid, it digests proteins in vitro.
The catalyst that cleaves proteins into truncated strings of amino acid residues or polypeptides.
In the digestive fluids of meat-eating and mixed-diet animals, there resides a protease enzyme responsible for the breakdown of meat proteins. The presence of this enzyme within humans serves as compelling evidence supporting the notion that humans have undergone evolution as omnivorous beings.
The enzyme released by specific glands in the stomach lining to decompose and digest proteins.