Protein

A protein (in Greek πρωτεϊνη = first thread) is a complex, high-molecular-weight organic compound that consists of amino acids joined by peptide bonds. Proteins are essential to the structure and function of all living cells and viruses.

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Many proteins are enzymes or subunits of enzymes. Other proteins play structural or mechanical roles, such as those that form the struts and joints of the cytoskeleton, serving as biological scaffolds for the mechanical integrity and tissue signalling functions. Still more functions filled by proteins include immune response and the storage and transport of various ligands. In nutrition, proteins serve as the source of amino acids for organisms that do not synthesize those amino acids natively.

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Proteins are one of the classes of bio-macromolecules, alongside polysaccharides, lipids, and nucleic acids, that make up the primary constituents of living things. They are among the most actively-studied molecules in biochemistry, and were discovered by J?ns Jakob Berzelius in 1838.

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Almost all natural proteins are encoded by DNA. DNA is transcribed to yield RNA, which serves as a template for translation by ribosomes.

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Greek: The noun Greek refers to:...

Organic compound: An organic compound is any member of a large class of chemical compounds whose molecules contain carbon, with exception of carbides, carbonates, carbon oxides and gases containing carbon. The study of organic compounds is termed organic chemistry. Many of these compounds, such as proteins, fats, and...

Amino acid: In chemistry, an amino acid is any molecule that contains both amino and carboxylic acid functional groups....

Protein related Images and Photos (experimental)

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