How Research Peptides Are Made: Solid-Phase Peptide Synthesis Explained

Solid-phase peptide synthesis anchors the growing chain to a resin and adds amino acids one at a time. Small losses compound at every cycle, which is why longer sequences give lower yields and messier impurity profiles.
What Peptides Actually Are: Structure, Chain Length and Classification

A peptide is a chain of amino acids joined by peptide bonds. The boundary between peptide, polypeptide and protein is convention rather than chemistry — and chain length shapes stability, synthesis and analysis.