https://wikimd.com/index.php?action=history&feed=atom&title=K-caseinK-casein - Revision history2026-04-23T19:13:30ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.com/index.php?title=K-casein&diff=5803470&oldid=prevPrab: CSV import2024-05-19T22:27:10Z<p>CSV import</p>
<p><b>New page</b></p><div>[[image:K-caseína_comic.jpg|thumb|left]] [[image:Punto_de_corte.jpg|thumb|left]] [[image:FITC-2D-skeletal.png|thumb|right]] '''K-casein''' (κ-casein) is a type of [[casein]] protein found in [[milk]] and is one of the several types of casein proteins that play a crucial role in the structure and stability of [[milk]] and [[cheese]]. It is particularly important in the process of [[milk coagulation]] and [[cheese making]].<br />
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==Structure and Function==<br />
K-casein is a glycoprotein that is composed of a single polypeptide chain with a molecular weight of approximately 19,000 Daltons. It is characterized by its high content of [[proline]] residues, which prevent it from forming a regular secondary structure. This unique structure allows k-casein to stabilize [[micelles]] in milk, preventing them from aggregating and precipitating.<br />
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==Role in Milk Coagulation==<br />
K-casein plays a critical role in the coagulation of milk, a process essential for [[cheese making]]. During coagulation, the enzyme [[rennin]] (also known as [[chymosin]]) cleaves k-casein at a specific site, resulting in the formation of para-k-casein and a glycomacropeptide. This cleavage destabilizes the micelles, leading to the aggregation of casein proteins and the formation of a gel-like structure, which is the basis of [[curd]].<br />
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==Genetic Variants==<br />
There are several genetic variants of k-casein, with the most common being A and B variants. These variants differ in their amino acid sequences and can influence the properties of milk, such as its coagulation time and the quality of the resulting cheese. The B variant is often associated with better cheese-making properties.<br />
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==Applications in Dairy Industry==<br />
K-casein is of significant interest in the [[dairy industry]] due to its impact on the texture and quality of dairy products. Understanding the properties of k-casein and its interaction with other casein proteins is essential for optimizing the production of various dairy products, including [[cheese]], [[yogurt]], and [[milk powder]].<br />
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==Research and Biotechnology==<br />
Advancements in [[biotechnology]] have enabled the production of recombinant k-casein, which can be used to study its properties and potential applications in the dairy industry. Additionally, genetic selection for favorable k-casein variants is a focus in [[animal breeding]] programs aimed at improving milk quality.<br />
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==See Also==<br />
* [[Casein]]<br />
* [[Milk]]<br />
* [[Cheese making]]<br />
* [[Rennin]]<br />
* [[Micelle]]<br />
* [[Dairy industry]]<br />
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==References==<br />
{{Reflist}}<br />
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[[Category:Proteins]]<br />
[[Category:Dairy products]]<br />
[[Category:Milk]]<br />
[[Category:Cheese]]<br />
[[Category:Biotechnology]]<br />
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