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  2. Amino acid - Wikipedia

    en.wikipedia.org/wiki/Amino_acid

    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] [4]

  3. Aspartic acid - Wikipedia

    en.wikipedia.org/wiki/Aspartic_acid

    Aspartic acid (symbol Asp or D; [4] the ionic form is known as aspartate), is an α-amino acid that is used in the biosynthesis of proteins. [5] The L-isomer of aspartic acid is one of the 22 proteinogenic amino acids, i.e., the building blocks of proteins. D-aspartic acid is one of two D-amino acids commonly found in mammals.

  4. Phenylalanine - Wikipedia

    en.wikipedia.org/wiki/Phenylalanine

    Phenylalanine ball and stick model spinning. Phenylalanine (symbol Phe or F) [3] is an essential α-amino acid with the formula C 9 H 11 NO 2.It can be viewed as a benzyl group substituted for the methyl group of alanine, or a phenyl group in place of a terminal hydrogen of alanine.

  5. Tyrosine - Wikipedia

    en.wikipedia.org/wiki/Tyrosine

    L-Tyrosine or tyrosine (symbol Tyr or Y) [2] or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins. It is a conditionally essential amino acid with a polar side group.

  6. Category:Amino acids - Wikipedia

    en.wikipedia.org/wiki/Category:Amino_acids

    An amino acid is any molecule that contains both amino and carboxylic acid functional groups. ... Acidic amino acids (2 C, 2 P) Alpha-Amino acids (4 C, ...

  7. Lysine - Wikipedia

    en.wikipedia.org/wiki/Lysine

    Lysine ball and stick model spinning. Lysine (symbol Lys or K) [2] is an α-amino acid that is a precursor to many proteins.Lysine contains an α-amino group (which is in the protonated −NH + 3 form when the lysine is dissolved in water at physiological pH), an α-carboxylic acid group (which is in the deprotonated −COO − form when the lysine is dissolved in water at physiological pH ...

  8. Serine - Wikipedia

    en.wikipedia.org/wiki/Serine

    Serine (symbol Ser or S) [3] [4] is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated − NH + 3 form under biological conditions), a carboxyl group (which is in the deprotonated − COO −

  9. Histidine - Wikipedia

    en.wikipedia.org/wiki/Histidine

    Histidine ball and stick model spinning. Histidine (symbol His or H) [2] is an essential amino acid that is used in the biosynthesis of proteins.It contains an α-amino group (which is in the protonated –NH 3 + form under biological conditions), a carboxylic acid group (which is in the deprotonated –COO − form under biological conditions), and an imidazole side chain (which is partially ...