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  2. Amino acid - Wikipedia

    en.wikipedia.org/wiki/Amino_acid

    Structure of a typical L-alpha-amino acid in the "neutral" form. Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. [1] Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins. [2] Only these 22 appear in the genetic code of life ...

  3. Stable isotope composition of amino acids - Wikipedia

    en.wikipedia.org/wiki/Stable_isotope_composition...

    The abundance of 15 N in some amino acids reflects an organism's position in a food web. This is due to the ways organisms metabolize different amino acids when they are consumed. Trophic amino acids (TrAAs) are first deaminated, meaning that the amino group is removed to produce an alpha-keto acid carbon skeleton.

  4. List of amino acids - Wikipedia

    en.wikipedia.org/wiki/List_of_amino_acids

    Amino acids are listed by type: Proteinogenic amino acid; Non-proteinogenic amino acids This page was last edited on 5 January 2020, at 17:16 (UTC). Text is ...

  5. Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Composition_of_the_human_body

    percent mass percent atoms Oxygen O 65.0 24.0 Carbon C 18.5 12.0 Hydrogen H 9.5 62.0 Nitrogen N 2.6 1.1 Calcium Ca 1.3 0.22 Phosphorus P 0.6 0.22 Sulfur S 0.3 0.038 Potassium K 0.2 0.03 Sodium Na 0.2 0.037 Chlorine Cl 0.2 0.024 Magnesium Mg 0.1 0.015 All others < 0.1 < 0.3

  6. File:Molecular structures of the 21 proteinogenic amino acids ...

    en.wikipedia.org/wiki/File:Molecular_structures...

    Портал:Molecular and cellular biology/Proteinogenic amino acids; Usage on sw.wikipedia.org Asidi amino; Usage on uk.wikipedia.org Амінокислоти; Usage on www.wikidata.org Q8066; Usage on yo.wikipedia.org Àwọn Amino acid; Usage on zh.wikipedia.org 蛋白胺基酸

  7. Leucine - Wikipedia

    en.wikipedia.org/wiki/Leucine

    Leucine ball and stick model spinning. Leucine (symbol Leu or L) [3] is an essential amino acid that is used in the biosynthesis of proteins.Leucine is an α-amino acid, meaning it contains an α-amino group (which is in the protonated −NH 3 + form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO − form under biological conditions), and a side ...

  8. Guanidine - Wikipedia

    en.wikipedia.org/wiki/Guanidine

    The conjugate acid is called the guanidinium cation, (C(NH 2) + 3). This planar, symmetric ion consists of three amino groups each bonded to the central carbon atom with a covalent bond of order 4/3. It is a highly stable +1 cation in aqueous solution due to the efficient resonance stabilization of the charge and efficient solvation by water ...

  9. Hydrophobicity scales - Wikipedia

    en.wikipedia.org/wiki/Hydrophobicity_scales

    The first and third scales are derived from the physiochemical properties of the amino acid side chains. These scales result mainly from inspection of the amino acid structures. [14] [1] Biswas et al., divided the scales based on the method used to obtain the scale into five different categories. [3]