Definition - What does Proteins mean?
Proteins in biochemistry are molecules that make up a very large portion of the mass of living organisms of all kinds, and are, therefore, an important part of the diet of any life form that does not perform photosynthesis. These molecules are composed of amino acids, which are linked in a genetically directed sequence and vary greatly in shape and properties.
Safeopedia explains Proteins
Proteins are composed of 20 or more amino acids linked in one or more linear chains, and the shape of these proteins and their individual properties are determined by the arrangement of these amino acid chains and their chemical attachments. Proteins play different individual roles in the healthy function of an organism and have specialized forms such as collagen, haemoglobin, antibodies and enzymes.