A Comprehensive Review of Peptides: Structure, Perform, And Therapeutic Functions Peptides, quick chains of amino acids linked by peptide bonds, are fundamental biomolecules that play essential roles in various biological processes. They function hormones, neurotransmitters, and signaling molecules, and are concerned in immune responses, enzymatic actions, and cellular signaling pathways. This report goals to supply an in depth overview of peptides, together with their structure, classification, synthesis, biological capabilities, and therapeutic purposes. Structure and Classification of Peptides Peptides are sometimes categorised primarily based on their size and structure. They can be categorized into: Oligopeptides: These are quick peptides consisting of two to 20 amino acids. Examples include dipeptides (2 amino acids) and tripeptides (three amino acids). Polypeptides: These are longer chains of amino acids, usually containing greater than 20 amino acids. Polypeptides can fold into particular three-dimensional buildings, that are important for their biological exercise. Proteins: When polypeptides fold into specific functional types and encompass a number of polypeptide chains, they are known as proteins. Proteins usually include 50 or more amino acids. The first structure of a peptide is determined by the sequence of amino acids, which is encoded by the genetic material. The secondary structure refers to local folding patterns, such as alpha-helices and beta-sheets, while the tertiary structure represents the overall three-dimensional shape of the peptide. Quaternary construction includes the arrangement of multiple polypeptide chains.