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The RRWQWR-based peptides designed, synthesized, and screened for antibacterial activity. In blue: hydrophobic amino acids; in red: cationic amino acids. (A) Linear monomer. (B) Linear palindromic peptide. (C) Branched dimeric peptide, in which the two monomers are linked to a tripeptide comprising Lys, Ahx (in red) and terminating in Cys (in blue). (D) Branched tetrameric peptide, comprising two of the peptides shown in (C) linked by a cysteine disulfide bridge (in blue).
