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an outdated term.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 ?
Because the saddlebag, which was made from the stomach of an animal, contained a coagulating enzyme known as rennin, the milk had been effectively separated into curds and whey by the combination of the rennin, the hot sun and the galloping motions of the horse.
Evaluation of baseline blood pressure and plasma rennin activity (PRA) as potential predictors of bevacizumab (B)-mediated hypertension in patients with early stage breast cancer (Abstract #602) - General Poster Session; Monday June 1, 1 p.
Increase in plasma rennin activity, that is observed during hard physical activities and is a result of glomerular sympathetic excitement may affect post exercise proteinuria [7,24].
1975) indicated that clotting time for rennin from calf could shorten 30 times when milk pH value lowered from 6.
The samples were analyzed with Flex control TM (Ultraflex control version 2) in the positive mode with delayed extraction, the acceleration voltage was set at 20 kV, 500 laser shots were summed, and an internal peptide mass (bradykinin, angiotensin, rennin substrate) calibration was done.
ENZYMES PRODUCTION AND DEMAND Overview Enzymes Production and Demand Carbohydrases Glucose Isomerase Glucoamylase Alphaamylase Pectinase Other Carbohydrase Enzymes Proteases Bacterial Proteases Rennin and Chymosin Other Proteases Lipases Medical Enzymes Other Enzymes Enzymes Imports and Exports Price Trending V.
1991) reported that Omg has inhibitory activity for pepsin and rennin.
Plasma rennin activity and aldosterone were more increased in the SP-only group compared with the other group.
3] levels and high BP and/or high plasma rennin activity (22).
In a rat study, the renal artery was clipped, stimulating the organ to make the hormone rennin, which in turn stimulates ACE to increase blood pressure.
Circulatory changes and rennin secretion in sheep in response to feeding.
Renin inhibitors, which block the initial, rate-limiting step of the rennin angiotensinaldosterone system (RAAS), are a novel approach to hypertension treatment.