Translations:Protein/2/en

Proteins, colloquially also called proteins, are macromolecules made up of amino acids. Proteins belong to the basic building blocks of all cells. They not only give the cell structure, but are the molecular "machines" that transport substances, pump ions into and out of cells, recognize chemical reactions catalyse and signal substance. The building blocks of proteins are certain amino acids known as proteinogenic, i.e. building proteins, which are linked to chains by peptide bonds. Humans are 21 different amino acids - the 20 long known and selenocysteine.