Cysteine

Rarity: Rare

A topic known well beyond its field, found in many languages.

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Notion

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Science and technology

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What Wikipedia says

Cysteine (; symbol Cys or C) is a semiessential proteinogenic amino acid with the formula HS−CH2−CH(NH2)−COOH. The thiol side chain in cysteine enables the formation of disulfide bonds, and often participates in enzymatic reactions as a nucleophile. Cysteine is chiral, but both D- and L-cysteine are found in nature.

Excerpt from the Wikipedia article “Cysteine”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NEUROtiker, Public domain, via Wikimedia Commons.