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amino acids

Cultural  
  1. Basic organic molecules (see also organic molecule) that combine to form proteins. Amino acids are made up of hydrogen, carbon, oxygen, and nitrogen. Some examples of amino acids are lysine, phenylalanine, and tryptophan.


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Amino acids are the basic molecular building blocks of proteins.

Example Sentences

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Researchers have considered alternative amino acids, alternative solvents, and even entirely different chemical structures.

From Science Daily • Jun. 24, 2026

Phenylalanine and tyrosine are two amino acids that help regulate metabolism and brain activity.

From Science Daily • Jun. 15, 2026

“You build on the brain’s natural ability to bring in important things, like iron or amino acids, and catch a ride,” he says.

From Barron's • Jun. 3, 2026

Peptides—short chains of amino acids marketed for recovery, muscle growth and antiaging—have become popular among U.S. wellness figures including Robert F. Kennedy Jr. and Joe Rogan, despite limited evidence for many of their claimed benefits.

From The Wall Street Journal • May 29, 2026

Chemical reactions like those in our laboratory vessels may be responsible for the organic matter in interstellar space and the amino acids found in meteorites.

From "Cosmos" by Carl Sagan

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