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An enzyme that catalyzes the coagulation of milk, obtained from the fourth stomach of calves and other young ruminants or from genetically engineered microorganisms and used in making cheeses and junkets. Also called chymosin.


(Biochemistry) an enzyme that occurs in gastric juice and is a constituent of rennet. It coagulates milk by converting caseinogen to casein. Also called: chymosin
[C20: from rennet + -in]


(ˈrɛn ɪn)

a coagulating enzyme occurring in the gastric juice of the calf, forming the active principle of rennet and able to curdle milk.
[1895–1900; renn (et) + -in1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rennin - an enzyme that occurs in gastric juice; causes milk to coagulate
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
enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
coagulase - an enzyme that induces coagulation
rennet - a substance that curdles milk in making cheese and junket
References in periodicals archive ?
They found that the rennin gene expressed in the kidney was increased as well as the angiotensin II activity in plasma.
Changes in the plasma rennin and urinary kallikerin, changes in the calcium dependent functions of vascular smooth muscle cells due to reduced Na/K ATPase activity, effects on Na/Ca exchange pumps and alterations in response to catecholamines have been suspected as the possible mechanism for the effect of lead on blood pressure [31, 40].
8) Likewise a rise in plasma rennin activity has been observed in psoriasis.
Chymosin, previously called rennin, is an aspartate proteinase which is found in the fourth stomach of suckling calves, among other animals (Ustunol and Hicks, 1990).
Patients using lipid-lowering therapy or rennin angiotensin system inhibitors (RAS) were excluded.
Cardiopulmonary receptor modulation of plasma rennin activity in normotensive and hypertensive subjects.
Similarly genes for HLA (human leukocyte antigen), T-cell receptor alpha or beta chain, rennin angiotensin system related genes (RAS) and several inflammatory factors or cytokine genes (Hsu et al.
Patients using lipid lowering therapy or rennin angiotensin system (RAS) inhibitors and those with febrile illness, infection, inflammatory diseases, gastro-intestinal, liver, thyroid and kidney diseases were excluded from the study.
The kidneys also regulate the fluid and electrolyte balance of the body and are the site of production hormones as rennin and erythropoietin.
Expression of components of the rennin angiotensin system in proliferating infantile haemangioma may account for the propranolol-induced accelerated involution.