histidine
noun
his·ti·dine
ˈhi-stə-ˌdēn 
: a crystalline essential amino acid C6H9N3O2 formed by the hydrolysis of most proteins
Examples of histidine in a Sentence
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High-quality protein is any protein that contains all of the nine essential amino acids (histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine) that our bodies don’t make on their own.
—
USA TODAY, 2 July 2023
This supplement also contains 100% of your daily value of folate, 3,000 percent of your daily value of B12, and the amino acid L-histidine.
—Tamar Kane, Verywell Health, 5 Feb. 2023
While some groups benefit from B12 and folate supplementation, less is known about L-histidine supplementation.
—Tamar Kane, Verywell Health, 5 Feb. 2023
Nickel chemically binds to a protein produced by the malaria parasite, called histidine-rich protein 2.
—Josie Garthwaite, Discover Magazine, 16 June 2012
In both samples, individuals with the derived G allele, which codes for the amino acid arginine, show lower melanin levels than those with the ancestral A allele, which codes for the amino acid histidine.
—Razib Khan, Discover Magazine, 5 Mar. 2010
This essential amino acid can help treat premature ejaculation by delaying the conversion of histidine into histamine in your body.
—Dallas News, 23 Dec. 2022
Carnosine is an antioxidant that protects against disease-causing free radicals in the body by combining with the amino acid histidine.
—Amber Smith, Discover Magazine, 17 Oct. 2022
Proline to histidine is another neutral to positive shift, also pointing to a net positive increase in regional charge.
—William A. Haseltine, Forbes, 22 Oct. 2021
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USA TODAY, 2 July 2023
This supplement also contains 100% of your daily value of folate, 3,000 percent of your daily value of B12, and the amino acid L-histidine.
—Tamar Kane, Verywell Health, 5 Feb. 2023
While some groups benefit from B12 and folate supplementation, less is known about L-histidine supplementation.
—Tamar Kane, Verywell Health, 5 Feb. 2023
Nickel chemically binds to a protein produced by the malaria parasite, called histidine-rich protein 2.
—Josie Garthwaite, Discover Magazine, 16 June 2012
In both samples, individuals with the derived G allele, which codes for the amino acid arginine, show lower melanin levels than those with the ancestral A allele, which codes for the amino acid histidine.
—Razib Khan, Discover Magazine, 5 Mar. 2010
This essential amino acid can help treat premature ejaculation by delaying the conversion of histidine into histamine in your body.
—Dallas News, 23 Dec. 2022
Carnosine is an antioxidant that protects against disease-causing free radicals in the body by combining with the amino acid histidine.
—Amber Smith, Discover Magazine, 17 Oct. 2022
Proline to histidine is another neutral to positive shift, also pointing to a net positive increase in regional charge.
—William A. Haseltine, Forbes, 22 Oct. 2021
Cite this Entry
“Histidine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/histidine. Accessed 16 Mar. 2025.
Copy CitationMedical Definition
histidine
noun
his·ti·dine
ˈhis-tə-ˌdēn
: a crystalline essential amino acid C6H9N3O2 formed by the hydrolysis of most proteins
—abbreviation His
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