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Structure and Property of the Naturally-Occurring Amino Acids

  • Page ID
    4687
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    Amino Acid 3 Letter Code 1 Letter Code Structure pKa1
    (
    α-carboxyl)
    pka2 (α-amino) pka3 (side chain)

    Nonpolar Side Chains

    Glycine Gly G tablea21.gif 2.35 9.78 .
    Alanine Ala A tablea2.gif 2.35 9.87 .
    Valine Val V tablea3.gif 2.29 9.74 .
    Leucine Leu L tablea4.gif 2.33 9.74 .
    Isoleucine Ile I tablea5.gif 2.32 9.76 .
    Methionine Met M tablea6.gif 2.13 9.28 .
    Proline Pro P tablea7.gif 1.95 10.64 .
    Phenylalanine Phe F tablea8.gif 2.20 9.31 .
    Tryptophan Trp W tablea9.gif 2.46 9.41 .

    Uncharged Polar Side Chains

    Serine Ser S tablea10.gif 2.19 9.21 .
    Threonine Thr T tablea11.gif 2.09 9.10 .
    Asparagine Asn N tablea12.gif 2.14 8.72 .
    Glutamine Gln Q tablea22.gif 2.17 9.13 .
    Tyrosine Tyr Y tablea14.gif 2.20 9.21 10.46
    Cysteine Cys C tablea15.gif 1.92 10.70 8.37

    Charged Polar Side Chains10.54

    Lysine Lys K tablea16.gif 2.16 9.06 10.54
    Arginine Arg R tablea17.gif 1.82 8.99 12.48
    Histidine His H tablea18.gif 1.80 9.33 6.04
    Aspartic Acid Asp D tablea19.gif 1.99 9.90 3.90
    Glutamic Acid Glu E tablea20.gif 2.10 9.47 4.07

    This page titled Structure and Property of the Naturally-Occurring Amino Acids is shared under a CC BY-NC-SA license and was authored, remixed, and/or curated by Henry Jakubowski.

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