leucine
noun
leu·cine ˈlü-ˌsēn 
: a white crystalline essential amino acid C6H13NO2 that is obtained by the hydrolysis of dietary protein (as of eggs, soy, or fish) and plays an important role in various physiological functions (as the regulation of insulin secretion and stimulation of protein synthesis in skeletal muscle)
Example Sentences
Recent Examples on the Web Each serving contains 20 grams of protein and is packed with essential amino acids like leucine and isoleucine, which aid in muscle recovery. 
Kayla Hui, Health.com, 27 Jan. 2022 After a really hard full-body workout, Baar recommends that athletes eat 0.4 g/kg of body weight of easily digestible leucine-rich protein. Washington Post, 25 Apr. 2022 All of these high-protein options are also rich in leucine, an essential amino acid involved in the growth and repair of muscle, skin, and bone. Outside Online, 17 Feb. 2021 This insertion added the peptide GLTSKRN (glycine-leucine-threonine-serine-lysine-arginine-asparagine) between Spike protein positions 214 and 215. William A. Haseltine, Forbes, 28 Sep. 2021 In simpler terms, make half of your plate carbohydrates (about 50-60 grams) and aim for 20-30 grams of protein, including essential amino acids, such as leucine. Sarah Schlichter, Outside Online, 16 Aug. 2021 Cow's milk is also a good source of leucine, an amino acid needed to trigger muscle protein synthesis. Cynthia Sass, Mph, Health.com, 7 Jan. 2022 The change from leucine (L) to proline (P) is likely to alter the structure of NSP4. William A. Haseltine, Forbes, 3 Sep. 2021 The 152 tryptophan is substituted for leucine in the California variants. William A. Haseltine, Forbes, 20 Sep. 2021 See More
Kayla Hui, Health.com, 27 Jan. 2022 After a really hard full-body workout, Baar recommends that athletes eat 0.4 g/kg of body weight of easily digestible leucine-rich protein. Washington Post, 25 Apr. 2022 All of these high-protein options are also rich in leucine, an essential amino acid involved in the growth and repair of muscle, skin, and bone. Outside Online, 17 Feb. 2021 This insertion added the peptide GLTSKRN (glycine-leucine-threonine-serine-lysine-arginine-asparagine) between Spike protein positions 214 and 215. William A. Haseltine, Forbes, 28 Sep. 2021 In simpler terms, make half of your plate carbohydrates (about 50-60 grams) and aim for 20-30 grams of protein, including essential amino acids, such as leucine. Sarah Schlichter, Outside Online, 16 Aug. 2021 Cow's milk is also a good source of leucine, an amino acid needed to trigger muscle protein synthesis. Cynthia Sass, Mph, Health.com, 7 Jan. 2022 The change from leucine (L) to proline (P) is likely to alter the structure of NSP4. William A. Haseltine, Forbes, 3 Sep. 2021 The 152 tryptophan is substituted for leucine in the California variants. William A. Haseltine, Forbes, 20 Sep. 2021 See More Word History
Etymology
French, from leuc- leuk-
First Known Use
1826, in the meaning defined above
Medical Definition
leucine
noun
leu·cine ˈlü-ˌsēn
: a white crystalline essential amino acid C6H13NO2 obtained by the hydrolysis of most dietary proteins —abbreviation Leu