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Updated: Jun 6, 2026

10:50
Qualitative and Quantitative Assays for Detection and Characterization of Protein Antimicrobials
Published on: April 10, 2016
Bead diffusion assay for discovering antimicrobial cyclic peptides
Viviana S Fluxà1, Noélie Maillard, Malcolm G P Page
1Department of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, CH-3012 Berne, Switzerland.
Abstract:
A combinatorial library of 15,536 cyclic decapeptide analogues of tyrocidine A and gramicidin S was prepared on photocleavable TentaGel beads. The beads were photolyzed without solvent, and spread onto an agar plate inoculated with bacterial lawn. Clear zones were formed around beads carrying antimicrobially active peptides such as E18 c(kVOrnLfThiYOrnLq), which inhibited growth of B. subtilis and selected MRSA strains.
