Multiple Antigenic Peptide is a one efficient way to produce high-titer anti-peptide antibodies and synthetic peptide vaccines. This system utilizes the α- and Σ-amino groups of lysine to form a backbone to which multiple peptide chains can be attached. Depending on the number of lysine tiers, different numbers of peptide branches (2, 4, 8, or others) can be synthesized. Their high molecular weights are suitable for immunizing without conjugation to a carrier protein.