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Lysine

Lysine

One of the 20 amino acids that make up proteins.

Chemistry

Keywords

lysine, Lys, amino acid, protein, peptide, polypeptide, polar side chain, zwitterionic structure, peptide bond, amide bond, amino acid sequence, molecule, organic chemistry, chemistry, biology, biochemistry

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Zwitterion

Lysine (C₆H₁₄N₂O₂)

Information

Molar mass: 146.19 g/mol

Melting point: 224 °C

Density: 1.125 g/cm³

Properties

Lysine is an essential amino acid for mammals. It is a colourless, crystalline substance, well soluble in water, poorly soluble in alcohol and insoluble in ether.

Occurrence and production

Dietary sources of lysine include animal proteins, such as fish and red meats, and plant proteins, such as legumes, including the common bean, soy beans and lentils.

Lysine can be produced through the hydrolysis of proteins, through fermentation or by total synthesis, proceeding from caprolactam, for example.

Uses

Lysine is used as a dietary supplement; it is also often added to animal feed. Lysine deficiency may cause immunodeficiency.

Zwitterion space-filling

Molecule

Molecule space-filling

Narration

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Amino acids

Amino acids are the monomers of proteins.

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