Peptide Science
Peptide
A peptide is a short chain of amino acids (typically 2-50) linked by peptide bonds, which are smaller than proteins and often act as signaling molecules in biological systems.
Detailed Explanation
Peptides are distinguished from proteins primarily by size — peptides contain fewer than ~50 amino acids while proteins are longer. Many peptides function as hormones, neurotransmitters, growth factors, or antimicrobial agents. Synthetic peptides are engineered to mimic or enhance these natural signaling functions for research purposes. Key examples include BPC-157 (healing), Semax (cognitive), and Semaglutide (metabolic).