arginine

American  

[ahr-juh-neen, -nahyn, -nin] / ˈɑr dʒəˌnin, -ˌnaɪn, -nɪn /

noun

Biochemistry.

1. an essential amino acid, C 6 H 14 N 4 O 2 : the free amino acid increases insulin secretion and is converted to urea in the liver by arginase. Arg; R

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arginine British  

/ ˈɑːdʒɪˌnaɪn /

noun

1. an essential amino acid of plant and animal proteins, necessary for nutrition and for the production of excretory urea

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arginine Scientific  

/ är′jə-nēn′ /

1. An amino acid that is essential for children but not for adults. Chemical formula: C ₆ H ₁₄ N ₄ O ₂ .

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Etymology

Origin of arginine

First recorded in 1885–90, arginine is from the German word Arginin, a name unexplained by its originators

Example Sentences

See Examples For:

arginine

Wu used cell cultures to identify genes and proteins affected by declining arginine levels.

From Science Daily ● Aug. 3, 2026

Six different codons encode arginine, highlighting its broad importance in protein production.

From Science Daily ● Aug. 3, 2026

The researchers also found that a moderate amount of arginine, roughly equivalent to the quantity in a couple of over-the-counter tablets, could potentially restore expression of the genes involved in MHC-1 production.

From Science Daily ● Aug. 3, 2026

When arginine is scarce, cells struggle to produce MHC-1, a protein that helps alert the immune system to threats such as mutated cells and invading viruses.

From Science Daily ● Aug. 3, 2026

In vertebrates, the basis for the phosphoric acid is creatine, whereas invertebrates have arginine instead.

From History of Phosphorus by Eduard Farber