cysteine

noun

cys·​te·​ine ˈsi-stə-ˌēn How to pronounce cysteine (audio)
: a crystalline sulfur-containing amino acid C3H7NO2S readily oxidizable to cystine

Examples of cysteine in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The body naturally produces taurine from the amino acid cysteine. Jillian Kubala, Rd, Health, 5 Nov. 2024 Previous work from Devaraj’s lab showed the amino acid cysteine, which was also likely prevalent during our planet’s youth, can act like a chemical clamp, fastening certain precursor molecules together to yield lipids. Bymitch Leslie, science.org, 30 Oct. 2024 While spice allergies are rare, a certain enzyme found in ginger (cysteine proteinase GP-1) may trigger allergic reactions in some people. Lauren O'Connor, Ms, Health, 16 Sep. 2024 Therefore, the team did a deep dive on scientific literature for fertility-boosting ingredients, landing on three of the most effective: myo-inositol, N-acetyl cysteine (NAC) and CoQ10. Emily Burns, WWD, 3 Sep. 2019 See all Example Sentences for cysteine 

Word History

Etymology

International Scientific Vocabulary, from cystine + -ein

First Known Use

1884, in the meaning defined above

Time Traveler
The first known use of cysteine was in 1884

Dictionary Entries Near cysteine

Cite this Entry

“Cysteine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cysteine. Accessed 23 Nov. 2024.

Medical Definition

cysteine

noun
cys·​teine ˈsis-tə-ˌēn How to pronounce cysteine (audio)
: a sulfur-containing amino acid C3H7NO2S occurring in many proteins and glutathione and readily oxidizable to cystine
abbreviation Cys

More from Merriam-Webster on cysteine

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