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[mass noun] An amino acid which is a constituent of most proteins.
- ‘Other examples of amino acids are alanine, leucine, cysteine, arginine, and tryptophan.’
- ‘All of these silks are composed of protein chains in which the amino acids glycine, alanine, and serine dominate.’
- ‘The neutral amino acids alanine, threonine and valine accumulated in the vesicles by factors of 30-50.’
- ‘They look like alanine molecules, or amino acids, or like chloroform.’
- ‘Also, a combination of the amino acids glycine, alanine and glutamic acid can relieve symptoms of prostatitis.’
Mid 19th century: coined in German as Alanin, from aldehyde + -an (for ease of pronunciation) + -ine.
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