Proteins:Large biomolecules composed of one or more long chains of amino acid residues essential for the structure, function, and regulation of the body's cells, tissues, and organs.
Amino acids: Organic compounds that combine to form proteins; amino acids and proteins are the building blocks of life.
Hydrochloric acid: A strong corrosive acid present in gastric juice that activates digestive enzymes such as pepsinogen into pepsin and helps break down foods in the stomach