rennin


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rennin

 [ren´in]
the milk-curdling enzyme found in the gastric juice of human infants (before pepsin formation) and abundantly in that of the calf and other ruminants; a preparation from the stomach of the calf is used to coagulate milk protein to facilitate its digestion. Rennin catalyzes the conversion of casein from a soluble to an insoluble form (paracasein or curd).

chy·mo·sin

(kī'mō-sin),
An aspartic proteinase structurally homologous with pepsin, formed from prochymosin; the milk-curdling enzyme obtained from the glandular layer of the stomach of the calf. Acts on a single peptide bond (-Phe-Met-) in κ-casein.
Synonym(s): chymase, pexin, rennase, rennet, rennin

rennin

/ren·nin/ (ren´in) chymosin.

rennin

(rĕn′ĭn)
n.
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.

rennin

[ren′in]
Etymology: ME, rennen, to run
a milk-curdling enzyme that occurs in the gastric juices of infants and is also contained in the rennet produced in the stomach of calves and other ruminants. It is an endopeptidase that converts casein to paracasein and was formerly used extensively as a curdling agent by the cheese industry. An artificially produced microbial rennet rather than the enzyme extracted from rennet in calves is used in half of the cheese produced in the United States today. Also called chymosin. Compare renin.

chy·mo·sin

(kī'mō-sin)
A proteinase structurally homologous with pepsin; the milk-curdling enzyme obtained from the stomach of the calf.
Synonym(s): rennin.

rennin

or

chymase

an enzyme present in gastric juice secreted by the gastric glands of the stomach wall that coagulates caseinogen in milk to form casein, which forms an insoluble curd (a calcium-casein compound) which is then attacked by pepsin. It is important particularly in young mammals because it increases retention time in the stomach allowing for a more efficient digestion of the primary food source.

rennin

an outdated term. See chymosin.
References in periodicals archive ?
1972) Inactivation of acid proteases from Rhizopus chinensis, Aspergillus saitoi and Mucor pusillus, and calf rennin by diazoacetylnorleucine methyl ester.
The Tekturna component targets the activity of the rennin angiotensin aldosterone system (RAAS), an important regulator of blood pressure.
Heather could start with the grilled mushroom, spinach and cheese ragout, but then she'd most likely sue them for clogging up her arteries with an excess of rennin and lipids.
the binding adrenal cortex imaging agent) by increasing plasma rennin activity.
The active component in rennet is known as rennin, the actual enzyme that causes milk to coagulate.
Sodium concentrations are regulated by the rennin-angiotensin-aldosterone homeostatic response--increased rennin induces this chain reaction may result in increased blood pressure; a symptom associated with hyponatremia (Epstein & Cohen-Sivan, 2007; von Duvillard, 2004).
In one study, 15 children with autism were divided into three groups; parents of patients in Group I received counseling regarding casein free diets (casein is a white, tasteless, odorless protein precipitated from milk by rennin.
Rennet (rehn-it) The product containing the enzyme rennin (rehn-ihn) that is added to milk to coagulate the milk and form curds.
Rennin (rennet) is a coagulating enzyme obtained from a young animal's stomach, usually a calf's stomach, that is used to curdle milk in foods such as cheese.
Effects of caffeine on plasma rennin activity, cathecolamines and blood pressure.
It is released to the serum due to the hydrolysis of [kappa]-casein peptide catalyzed by rennin incheese elaboration.
In young ruminants, stomach glands are responsible for the secretion of another protein-digesting enzyme, rennin (converted from the zymogen, prorennin).