rennin


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rennin:

see rennetrennet,
substance containing rennin, an enzyme having the property of clotting, or curdling, milk. It is used in the making of cheese and junket. Rennet is obtained from the stomachs of young mammals living on milk, especially from the inner lining of the fourth, or true,
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Rennin

 

(also chymosin), a proteolytic enzyme produced by the mucous membrane of the abomasum, or fourth stomach, of young ruminants. Rennin, in the form of abomasal extract, has long been used for coagulating milk in cheese-making. It is synthesized as an inactive precursor, renninogen, which is converted into rennin in an acid medium at pH < 5.0. The starting substrate for rennin is the milk protein κ-casein, which under the action of rennin loses the ability to stabilize the casein micelles. Rennin is obtained in crystalline form; its molecule is composed of a polypeptide chain (molecular weight ~ 34,000) in which dicarboxylic amino acids predominate. Rennin resembles pepsin in many of its properties.

rennin

[′ren·ən]
(biochemistry)
An enzyme found in the gastric juice of the fourth stomach of calfs; used for coagulating milk casein in cheesemaking. Also known as chymosin.
References in periodicals archive ?
The production of UF (ultrafiltrated) white soft cheese using fungal rennin (1 ml fungal rennin/100 ml milk) from Rhizomucor miehei NRRL 2034 in the laboratory showed very close properties to calf rennet cheese used as a control.
Rennin is secreted from juxtaglomerular cell, which could activate liver to produce Ang I, and then transferred into Ang II, and Ang III transferred from Ang II.
Its critical importance in the production of cheeses combined with the current high demand for cheeses has resulted in a worldwide shortage of rennin. This shortage is made more serious due to a contraction of the veal calf market; bovine rennet has traditionally been extracted from the abomasum of unweaned calves.
Influence of genetic polymorphisms of the rennin angiotensin system on IgA ne-phropathy.
Dates are also known to be high in carbs (giving you energy), vitamins B and D, calcium, phosphorous, iron (to combat anemia) and rennin (which aids the flexibility of blood vessels).
Uric acid has some physiologic functions including activation of the rennin angiotensin system and direct actions on endothelial cells and vascular smooth muscle cells.
On average, the participants took 2.6 classes of antihypertensive drugs; rennin inhibitors (angiotensin converting enzyme inhibitors or angiotensin II receptor blockers) and diuretics were the most commonly used (83.8% and 69.4%, resp.).
Several causal factors such as reactive oxygen species (ROS), cytokines, and chemokines synthesis contribute to the pathogenesis of renal damage [7, 8], among these mechanisms interaction between both arms of rennin angiotensin system (RAS), ACE-angiotensin II (Ang II)-Ang II receptor 1 (AT1R) and ACE2-angiotensin 1-7 (Ang 1-7)-Mas receptor (MasR) axis, has progressively assumed an important role [9, 10].
The dietary change was also shown to cause the kidneys to release more of a protein called rennin and its hormone aldosterone, which is linked with high blood pressure.
Blood samples were collected to measure plasma rennin activity (PRA) in further analysis.
(Space constraints limited the amount of information we are able to share at this time The early winter issue of the Colorado Nurse will include a more comprehensive article about Dr Rennin If you were one of those who life and career were influenced by Dr Rennin.
(61) Following these studies, we showed that porcine cathepsin D, bovine rennin (later called chymosin) and acid peptidases from insectivorous plants and several fungi were also inhibited by DAN, EPNP and pepstatin, indicating a wider range of distribution of these peptidases, (62-68) and identified the DAN-reactive Asp residue in bovine chymosin.