Definition: Peptide, in Greek, refers to a long protein molecule composed of amino acids that are linked by peptide bonds. This structure allows proteins to recognize and interact with other molecules, including DNA and RNA. Definition: A peptide is a long sequence of amino acids that forms a single unit. Peptides can be modified or synthesized from natural sources (like bacteria) or synthetic ones based on specific amino acid sequences. The key feature of a protein is its ability to interact with other proteins, enzymes, and molecules using these bonds, facilitating biological functions. For example, in the process of digestion, the breakdown of carbohydrates into simple sugars and other components of the body's tissues, the digestive system uses specific proteins that include amino acids like glycine (Gly) to break down carbohydrates.
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