phenylalanine
noun
phe·nyl·al·a·nine
ˌfe-nᵊl-ˈa-lə-ˌnēn 
ˌfē-
: an essential amino acid C9H11NO2 that is converted in the normal body to tyrosine
Examples of phenylalanine in a Sentence
Recent Examples on the Web
Certain proteins and amino acids, such as glutamine, arginine, and phenylalanine, can boost GLP-1 release.
—
Sarah Jividen, Health, 17 July 2024
The name refers to amino acids involved in two new mutations on the virus’s spike protein: phenylalanine (F), leucine (L), arginine (R) and threonine (T).
—Lauren J. Young, Scientific American, 5 June 2024
These variants are offshoots of Omicron and get their name from their spike protein mutations: The amino phenylalanine (abbreviated as F) replaces the amino acid leucine (abbreviated as L), while the amino acid arginine (R) is replaced by threonine (T).
—Korin Miller, Verywell Health, 8 May 2024
That’s because those born with PKU have inherited a gene mutation that prevents an enzyme called phenylalanine hydroxylase (PAH) from converting phenylalanine into stuff that your body can use.
—Bruce Y. Lee, Forbes, 18 Feb. 2024
See all Example Sentences for phenylalanine 
Sarah Jividen, Health, 17 July 2024
The name refers to amino acids involved in two new mutations on the virus’s spike protein: phenylalanine (F), leucine (L), arginine (R) and threonine (T).
—Lauren J. Young, Scientific American, 5 June 2024
These variants are offshoots of Omicron and get their name from their spike protein mutations: The amino phenylalanine (abbreviated as F) replaces the amino acid leucine (abbreviated as L), while the amino acid arginine (R) is replaced by threonine (T).
—Korin Miller, Verywell Health, 8 May 2024
That’s because those born with PKU have inherited a gene mutation that prevents an enzyme called phenylalanine hydroxylase (PAH) from converting phenylalanine into stuff that your body can use.
—Bruce Y. Lee, Forbes, 18 Feb. 2024
See all Example Sentences for phenylalanine
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“Phenylalanine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phenylalanine. Accessed 26 Jul. 2024.
Copy CitationMedical Definition
phenylalanine
noun
phe·nyl·al·a·nine
ˌfen-ᵊl-ˈal-ə-ˌnēn, ˌfēn-
: an essential amino acid C9H11NO2 that is obtained in its levorotatory L-form by the hydrolysis of proteins (as lactalbumin), that is essential in human nutrition, and that is converted in the normal body to tyrosine
—abbreviation Phe
see phenylketonuria, phenylpyruvic acid
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