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pepsin    
n. 胃液素,酸蛋白酶

胃液素,酸蛋白□

pepsin
n 1: an enzyme produced in the stomach that splits proteins into
peptones

Pepsin \Pep"sin\ (p[e^]p"s[i^]n), n. [Gr. pe`psis a cooking,
digesting, digestion, fr. pe`ptein, pe`ssein, to cook,
digest: cf. F. pepsine. Cf. {Dyspepsia}.] (Physiol. Chem.)
A proteolytic enzyme (MW 34,500) contained in the secretory
glands of the stomach. In the gastric juice it is united with
dilute hydrochloric acid (0.2 per cent, approximately) and
the two together constitute the active portion of the
digestive fluid. It degrades proteins to proteoses and
peptides, and is notable for having a very low pH optimum for
its activity. It is the active agent in the gastric juice of
all animals.
[1913 Webster PJC]

Note: As prepared from the glandular layer of pigs' or
calves' stomachs it constitutes an important article of
pharmacy.
[1913 Webster]


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  • Pepsin - Wikipedia
    Pepsin is an aspartic protease, using a catalytic aspartate in its active site [2] It is one of three principal endopeptidases (enzymes cutting proteins in the middle) in the human digestive system, the other two being chymotrypsin and trypsin
  • Pepsin | Description, Production, Function | Britannica
    Pepsin is a powerful enzyme in gastric juice that digests proteins such as those in meat, seeds, and dairy products It is the mature active form of pepsinogen, which is released into the stomach and mixed with hydrochloric acid to produce pepsin
  • Pepsin: Signs You Need This Vital Enzyme and How to Get It - Dr. Axe
    The definition of pepsin is a digestive enzyme in the stomach that breaks down proteins into smaller units called polypeptides (or peptides for short) This enzyme helps digest proteins — such as those found in meat, eggs, dairy products, nuts and seeds — by breaking bonds that link amino acids
  • Rethinking Reflux: The Real Culprit Isn’t Acid—It’s Pepsin
    At-A-Glance The digestive enzyme pepsin, not acid, is the primary culprit behind reflux-related damage Unlike acid, pepsin sticks to tissues in the throat and airways, reactivating with acidic foods and causing long-term harm Many people with reflux don’t experience heartburn
  • Pepsin: The Powerful Enzyme That Breaks Down Protein
    Pepsin is the primary protein-digesting enzyme in the stomach, responsible for breaking down dietary proteins into smaller peptides that can be further processed by intestinal enzymes
  • Pepsin and Acid Reflux: Your Comprehensive Guide to Relief
    Understanding the role of pepsin can transform how you approach managing reflux and its myriad symptoms What is Pepsin? Pepsin is a powerful enzyme in your stomach responsible for digesting proteins It breaks down protein molecules into smaller, manageable pieces
  • Pepsin: The Most Common Acid In Protein Digestion | MedShun
    Pepsin is a powerful digestive enzyme that plays a crucial role in breaking down proteins in the stomach It is one of the most common acids that proteins encounter during digestion, as it is activated by the highly acidic environment of the stomach
  • Pepsin - an overview | ScienceDirect Topics
    Pepsin is defined as a powerful enzyme present in gastric juice that aids in the digestion of complex food particles, produced from its proenzyme pepsinogen through reaction with hydrochloric acid (HCl) in the stomach
  • What to Know About Pepsin: Benefits Uses - Onnit
    Pepsin is an enzyme in the stomach that helps break down the protein in your food for digestion Specifically, it acts on the proteins in meat, eggs, dairy products, nuts, and seeds





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