: a crystalline essential amino acid C5H11NO2 that is one of the building blocks of plant and animal proteins
Examples of valine in a Sentence
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This means there is twice as much leucine as there is isoleucine or valine.
—
Lindsay Curtis, Verywell Health, 25 Jan. 2026
In the enzyme’s chain of 484 amino acids, one amino acid at position 429, called alanine, was replaced with valine.
—Mindy Weisberger, CNN Money, 22 Aug. 2025
BCAAs are three amino acids—leucine, isoleucine, and valine—that aren't naturally made in the body.
—Health, 17 June 2025
Amino acid supplements are typically either EAA (essential amino acids) or BCAA (branched chain amino acids, which are three amino acids—leucine, isoleucine, and valine—that the body cannot produce itself).
—Misaki Kawatsu, Vogue, 10 June 2025
Nine essential amino acids—histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine—are available only through foods or supplements.
—Stacey Colino, Time, 27 May 2025
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Lindsay Curtis, Verywell Health, 25 Jan. 2026
In the enzyme’s chain of 484 amino acids, one amino acid at position 429, called alanine, was replaced with valine.
—Mindy Weisberger, CNN Money, 22 Aug. 2025
BCAAs are three amino acids—leucine, isoleucine, and valine—that aren't naturally made in the body.
—Health, 17 June 2025
Amino acid supplements are typically either EAA (essential amino acids) or BCAA (branched chain amino acids, which are three amino acids—leucine, isoleucine, and valine—that the body cannot produce itself).
—Misaki Kawatsu, Vogue, 10 June 2025
Nine essential amino acids—histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine—are available only through foods or supplements.
—Stacey Colino, Time, 27 May 2025
Cite this Entry
“Valine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/valine. Accessed 14 Feb. 2026.
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