Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Amino acids are small molecules that serve as the building blocks of proteins.

From Science Daily • Mar. 12, 2026

Amino acids exist in two mirror image forms, similar to left and right hands.

From Science Daily • Feb. 12, 2026

"Amino acids are the building blocks of proteins," said Dandrea-Russert.

From Salon • Oct. 11, 2023

Amino acids can occur in two mirror-image forms, but life exclusively uses left-handed ones.

From Science Magazine • Sep. 24, 2023

Amino acids have been assembled under primitive Earth conditions into molecules resembling proteins.

From "Cosmos" by Carl Sagan