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Peptides: Structure, Function, Peptide Synthesis & Research Applications Peptides are short chains of amino acids linked by peptide bonds, typically 2 to 50 residues long, and are fundamental to cell biology, distinguishing them from longer polypeptides
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Loren Pickart in 1973, GHK-Cu was discovered when Pickart observed that albumin from young donors (age 20-25) could stimulate aged liver tissue to synthesize proteins at a youthful rate, and the active factor was traced to this small copper peptide