PEPSIN

Pronunciation (US):

(GB):

 Dictionary entry overview: What does pepsin mean? 

• PEPSIN (noun)
  The noun PEPSIN has 1 sense:

1. an enzyme produced in the stomach that splits proteins into peptones

  Familiarity information: PEPSIN used as a noun is very rare.

 Dictionary entry details 

• PEPSIN (noun)

Sense 1

Meaning:

An enzyme produced in the stomach that splits proteins into peptones

Classified under:

Nouns denoting substances

Hypernyms ("pepsin" is a kind of...):

enzyme (any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions)

Holonyms ("pepsin" is a substance of...):

gastric acid; gastric juice (digestive secretions of the stomach glands consisting chiefly of hydrochloric acid and mucin and the enzymes pepsin and rennin and lipase)

Derivation:

peptic (relating to or promoting digestion)

 Context examples 

It occurs when the amount of acid and pepsin is sufficient to overcome the gastric mucosal barrier.

(Peptic Ulcer, NLM, Medical Subject Headings)

Acid in the stomach changes pepsinogen to pepsin, which breaks down proteins in food during digestion.

(Pepsinogen, NCI Dictionary)

Stomach acid changes a protein called pepsinogen into pepsin.

(Pepsin, NCI Dictionary)

They synthesize and secrete pepsinogen, a precursor of the enzyme pepsin.

(Chief Cell, NLM, Medical Subject Headings)

Chief cells synthesize and secrete pepsinogen, a precursor of the enzyme pepsin.

(Murine Chief Cells, Gastric, NLM, Medical Subject Headings)

Homatropine methylbromide, a competitive inhibitor of acetylcholine at the muscarinic receptor, blocks parasympathetic nerve stimulation, thereby inhibiting pepsin and gastrin secretion.

(Homatropine Methylbromide, NCI Thesaurus)

The digestive secretions of the gastric glands in the stomach, consisting mainly of pepsin, hydrochloric acid, rennin, and mucin.

(Gastric Secretion, NCI Thesaurus)

Little absorbed from the gastrointestinal tract, bismuth subsalicylate exerts a local effect on the gastric mucosa, coating it and protecting it from the corrosive effects of acid and pepsin.

(Bismuth Subsalicylate, NCI Thesaurus)

A divalent F(ab)2 fragment of the monoclonal antibody (MoAb ) B6.2 directed against the tumor-associated glycoprotein (TAG-90) found on the surface of primary and metastatic human mammary tumors.. MoAb B6.2 F(ab)2 fragments are obtained through pepsin digestion.

(Monoclonal Antibody B6.2F(ab')2, NCI Thesaurus)

Ulcer that occurs in those portions of the alimentary tract which come into contact with gastric juice containing pepsin and acid.

(Peptic Ulcer, NLM, Medical Subject Headings)