Peptides are short chains of amino acids, typically consisting of 2 to 50 amino acid residues, linked together by peptide bonds. They are distinguished from proteins primarily by their shorter length, though the boundary between the two is not strictly defined.
In the context of biological research, peptides serve as critical signaling molecules. They act as hormones, neurotransmitters, and growth factors, playing vital roles in virtually every physiological process in the body — from metabolism and immune function to tissue repair and cognitive performance.
Synthetic peptides have become indispensable tools in modern research. By replicating naturally occurring peptide sequences, scientists can study specific biological pathways with precision, test hypotheses about disease mechanisms, and explore potential therapeutic targets.
The field of peptide research has expanded rapidly over the past two decades, with thousands of novel peptide sequences being studied for applications ranging from metabolic regulation and wound healing to neuroprotection and anti-aging.