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Proteins

A molecule made up of amino acids. Proteins are needed for the body to function properly. They are the basis of body structures, such as skin and hair, and of other substances such as enzymes, cytokines, and antibodies.

PubMed Health Glossary
(Source: NIH - National Cancer Institute)

Terms to know

Amino Acids
A chemical building block of proteins. There are 20 standard amino acids. A protein consists of a specific sequence of amino acids.
Antibodies
A protein produced by the immune system in response to a foreign substance such as a virus or bacterium.
Collagen
A fibrous protein found in cartilage and other connective tissue.
Cytokines
Powerful chemical substances secreted by cells that enable the body's cells to communicate with one another. Cytokines include lymphokines produced by lymphocytes and monokines produced by monocytes and macrophages.
Enzymes
Protein made by the body that brings about a chemical reaction - for example, the enzymes produced by the gut to aid digestion.

Terms to know

Amino Acids
A chemical building block of proteins. There are 20 standard amino acids. A protein consists of a specific se...
Antibodies
A protein produced by the immune system in response to a foreign substance such as a virus or bacterium....
Collagen
A fibrous protein found in cartilage and other connective tissue....
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