Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An essential amino acid, C6H13NO2, obtained by the hydrolysis of protein by pancreatic enzymes during digestion and necessary for optimal growth in children and for the maintenance of nitrogen balance in adults.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Physiol. Chem.) a naturally occurring alpha-amino acid ((CH3)2CH.CH2.CH(NH2)-COOH), one of the building units of almost all proteins of living organisms, both animal and vegetable. It is one of the essential amino acids (not synthesized by the human body, a required component for proper nutrition), and is hydrophobic in character when bound in proteins. In isolated form it is a white, crystalline, zwitterionic substance formed, e. g. by the decomposition of proteins by pancreatic digestion, by the action of boiling dilute mineral acid, or by putrefaction. Chemically it is to be considered as amido-caproic acid. It occurs as two optical isomers, the L- and D-forms. The L-form, L-leucine, is the natural form, present in most proteins.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry An essential amino acid, C6H13NO2, isomeric with isoleucine, found in most animal proteins; it is essential for growth in children.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a white crystalline amino acid occurring in proteins that is essential for nutrition; obtained by the hydrolysis of most dietary proteins

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[French : leuc–, leuc– + –ine, –ine.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek λευκός (leukos, "white") +‎ -ine

Examples

  • Amaranth protein, itself, is low in the amino acid leucine, which is not a serious limitation because leucine is found in excess in most common grains.

    4 Grain Amaranths

  • As a model system for studying real-time protein folding dynamics, the TUM scientists chose a so-called leucine zipper found in yeast.

    PhysOrg.com - latest science and technology news stories

  • Mgc80835 was recently termed leucine-rich repeat flightless-interacting protein 2 (LRRFIP2) and found to activate the canonical Wnt signaling pathway upstream of ctnnb1/beta-catenin

    PLoS ONE Alerts: New Articles

  • As a model system for studying real-time protein folding dynamics, the TUM scientists chose a so-called leucine zipper found in yeast.

    Medlogs - Recent stories

  • As a model system for studying real-time protein folding dynamics, the TUM scientists chose a so-called leucine zipper found in yeast.

    Medlogs - Recent stories

  • As a model system for studying real-time protein folding dynamics, the TUM scientists chose a so-called leucine zipper found in yeast.

    THE MEDICAL NEWS

  • At the start of the SILK test, volunteers were connected to an intravenous drip that gave them a slightly altered form of the amino acid leucine, which is a component of A-beta.

    Science Blog - Science news straight from the source

  • At the start of the SILK test, volunteers were connected to an intravenous drip that gave them a slightly altered form of the amino acid leucine, which is a component of A-beta.

    PhysOrg.com - latest science and technology news stories

  • It was there that they discovered Reuben lacked two amino acids called leucine and isoluceine.

    Home | Mail Online

  • At the start of the SILK test, volunteers were connected to an intravenous drip that gave them a slightly altered form of the amino acid leucine, which is a component of A-beta.

    Health News from Medical News Today

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