CYSTEINE

cysteine

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

Source: WordNet® 3.1

Etymology

An alteration of cystine.

Noun

cysteine (countable and uncountable, plural cysteines)

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

Usage notes

When used as the name of a substance, this noun is uncountable, but when used as the name of individual molecules, it is countable.

Synonyms

• E910 when used as a food additive

• E920 when used as an improving agent

• Cys when viewed as a monomer in proteins

Source: Wiktionary

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