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  2. Protein - Wikipedia

    en.wikipedia.org/wiki/Protein

    The words protein, polypeptide, and peptide are a little ambiguous and can overlap in meaning. Protein is generally used to refer to the complete biological molecule in a stable conformation, whereas peptide is generally reserved for a short amino acid oligomers often lacking a stable 3D structure. But the boundary between the two is not well ...

  3. Human nutrition - Wikipedia

    en.wikipedia.org/wiki/Human_nutrition

    Proteins are the basis of many animal body structures (e.g. muscles, skin, and hair) and form the enzymes that control chemical reactions throughout the body. Each protein molecule is composed of amino acids which contain nitrogen and sometimes sulphur (these components are responsible for the distinctive smell of burning protein, such as the ...

  4. Protein as nutrient - Wikipedia

    en.wikipedia.org/wiki/Protein_in_human_nutrition

    Protein is a nutrient needed by the human body for growth and maintenance. Aside from water, proteins are the most abundant kind of molecules in the body. Protein can be found in all cells of the body and is the major structural component of all cells in the body, especially muscle. This also includes body organs, hair and skin.

  5. 18 High Protein Foods That Will Boost Your Health - AOL

    www.aol.com/18-high-protein-foods-boost...

    Per the expert, protein also helps keep blood sugar stable, stimulates our metabolism, supports exercise performance, helps detoxify the body and lets our brain know when we are full. So, yeah, it ...

  6. Biomolecule - Wikipedia

    en.wikipedia.org/wiki/Biomolecule

    An apoenzyme (or, generally, an apoprotein) is the protein without any small-molecule cofactors, substrates, or inhibitors bound. It is often important as an inactive storage, transport, or secretory form of a protein. This is required, for instance, to protect the secretory cell from the activity of that protein.

  7. List of proteins - Wikipedia

    en.wikipedia.org/wiki/List_of_proteins

    Schematic representation of structural classes of protein according to the CATH classification scheme. [1] Proteins are a class of macromolecular organic compounds that are essential to life. They consist of a long polypeptide chain that usually adopts a single stable three-dimensional structure.

  8. Protein structure - Wikipedia

    en.wikipedia.org/wiki/Protein_structure

    Protein structures range in size from tens to several thousand amino acids. [2] By physical size, proteins are classified as nanoparticles, between 1–100 nm. Very large protein complexes can be formed from protein subunits. For example, many thousands of actin molecules assemble into a microfilament.

  9. Plasma protein - Wikipedia

    en.wikipedia.org/wiki/Plasma_protein

    Contrary to popular belief, haemoglobin is not a blood protein, as it is carried within red blood cells, rather than in the blood serum. Serum albumin accounts for 55% of blood proteins, [ 1 ] is a major contributor to maintaining the oncotic pressure of plasma and assists, as a carrier, in the transport of lipids and steroid hormones .