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  1. Proteins and Polypeptides – Basics, Structures, Functions, and Properties

    Jan 13, 2026 · Each protein contains one or more polypeptide chain. The chemical properties and order of the amino acids determines the structure and function of the polypeptide.

  2. Protein - Wikipedia

    Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues.

  3. Protein: What It Is, Types, Uses, Needs, Deficiency

    Oct 11, 2025 · Proteins are large molecules made up of chains of amino acids that are important for cell function, tissue structure, and body regulation. Most people in the U.S. consume more protein than …

  4. What Are Proteins? Definition, Types & Examples

    Jun 23, 2025 · People generally say “protein” (or “dietary protein”) when talking about nutrition and “proteins” when discussing the science of how the individual molecules work within your body.

  5. High-protein foods: The best protein sources to include in a healthy ...

    Dec 1, 2023 · Including protein-rich foods in your diet is vital for maintaining overall health and well-being. But how much protein do you need and what are the best sources of this essential …

  6. Protein | Definition, Structure, & Classification | Britannica

    Dec 31, 2025 · A protein is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many …

  7. What is protein? High protein foods, explained by nutritionists

    4 days ago · What is protein? Protein is one of the body’s three macronutrients, along with carbohydrates and fat. Each provides calories and energy, but they serve different purposes.

  8. Protein: Function, Benefits, Deficiency, Sources, More - Health

    Nov 18, 2025 · Protein is a macronutrient that supports immune function, muscle growth, and hormone synthesis. High-protein diets improve bone health and reduce blood sugar spikes.

  9. Protein: Why Your Body Needs It - WebMD

    Sep 11, 2024 · Your body needs protein to stay healthy and work the way it should. More than 10,000 types are found in everything from your organs to your muscles and tissues to your bones, skin, and …

  10. Protein - National Human Genome Research Institute

    6 days ago · A protein is made up of one or more long, folded chains of amino acids (each called a polypeptide), whose sequences are determined by the DNA sequence of the protein-encoding gene.