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Configurations of drug delivery systems with targeting ligands (green chevrons) and drug payloads (orange crosses). Highlighted are simple monovalent peptide-drug conjugates (A), multivalent peptide-drug conjugates (B), multivalent peptide-polymer-drug conjugates (C), monovalent (D1) and multivalent (D2) peptide-liposome conjugates, and peptide-micelle conjugates (E).
