Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An amino acid, C3H7O2NS, derived from cystine and found in most proteins.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry A sulphur-containing nonessential amino acid C3H7NO2S found in most animal proteins; it readily oxidizes to cystine.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Alteration of cystine.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

An alteration of cystine.

Examples

  • Bacteria start self-cleaving in response to a molecule inside cells called InsP6, which in turn activates a process called cysteine protease.

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  • All these contain an amino acid called cysteine, the basic building block of glutathione.

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  • Nevertheless, whey is rich in glutamylcystine, a very stable and an easy to get inside the cell form of cysteine, which is a precursor of glutathione, and low glutathiione levels have been implicated in overtraining, cancer, Hepatitis, AIDS, Parkinson, Cystic Fibrosis and Sarcopenia lost of muscle mass.

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  • Among dozens of components known to exist in this crude extract, the best studied components are a group of protein-digesting enzymes (called cysteine proteinases).

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  • Among dozens of components known to exist in this crude extract, the best studied components are a group of protein-digesting enzymes (called cysteine proteinases).

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  • Researchers believe it has to do with the amino acid cysteine, which is released from the chicken as it cooks.

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  • Eggs and meat are rich in amino acid cysteine, which is thought to be good at clearing out toxins.

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  • Some manufacturers use an ingredient called L-cysteine, which is a protein made from pig or other animal hair and which is used to soften the dough.

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  • This is also supported by an enrichment of protein functions such as cysteine-type endopeptidase activity, lysozyme activity, or lipase activity.

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  • The thyroid uses glutathione, a combination of three amino acids (glycine, glutamine, and cysteine), protectively as an antioxidant or free radical quencher and as a cofactor that makes it possible for one of its most important enzymes (5'-deiodinase) to work (6).

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Comments

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  • part of homocysteine; a still arguable indicator of cardiovascular disease.

    September 21, 2008