Lexic.us

Definition of Cysteine

1. Noun. An amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine.

Definition of Cysteine

1. Noun. (amino acid) A sulphur-containing nonessential amino acid C₃H₇NO₂S found in most animal proteins; it readily oxidizes to cystine. ¹

¹ Source: wiktionary.com

Definition of Cysteine

1. an amino acid [n -S]

Medical Definition of Cysteine

1. The only amino acid to contain a thiol (SH) group. In intracellular enzymes the unique reactivity of this group is frequently exploited at the catalytic site. In extracellular proteins found only as _ cystine in disulphide bridges or fatty acylated. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Cysteine

Literary usage of Cysteine

Below you will find example usage of this term as found in modern and/or classical literature:

1. Journal of the American Chemical Society by American Chemical Society (1879)
"Urry, et a/.,*1 have reported observing an absorption maximum at 283 m/i for cysteine at pH 6.2 which is assigned to a sulfhydryl transition. ..."

2. Proceedings of the Society for Experimental Biology and Medicine (1903)
"... withholding ne and cysteine while keeping other : factors constant would depress ivity. Described are in vitro hepatic 1 intestinal MFO activity of rats ..."

3. Physiological chemistry: A Text-book and Manual for Students by Albert Prescott Mathews (1916)
"Is the sulphur of cysteine oxidized while the latter is still a component of the protein molecule, giving a sulphuric-acid group attached to the protein? ..."

4. Organic Chemistry for Advanced Students by Julius Berend Cohen (1907)
"cysteine, unlike serine, is powerfully laevo-rotatory, although it is partially ... According to Baumann's original formulae for cysteine ..."

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