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Updated: Jun 21, 2026

Purification and Visualization of Lipopolysaccharide from Gram-negative Bacteria by Hot Aqueous-phenol Extraction
Published on: May 28, 2012
Differential presentation of a single antimicrobial peptide is sufficient to identify LPS from distinct bacterial
Timothy M Reichart1, Joshua R Uzarski2, Charlene M Mello1
1Office of the Chief Scientist, Combat Capabilities Development Command Soldier Center, Natick, MA 01760, USA. charlene.m.mello2.civ@mail.mil.
Abstract:
Rapid detection and identification of bacteria is important for human health, biodefense, and food safety. Small arrays of different antimicrobial peptides (AMPs) enable the identification of lipopolysaccharide (LPS) samples from a variety of bacterial species and strains. A model system for examining how peptide presentation affects LPS detection is the sheep myeloid antimicrobial peptide (SMAP-29), which contains a helix-turn-helix motif. Varying the cysteine attachment site on SMAP-29 controls the three-dimensional presentation of the peptide on the surface, altering the ability of the peptide to discriminate between LPS samples. A small array of only SMAP-29 variants-and no other peptides-is capable of discriminating among LPS samples from multiple bacterial species, as well as between different strains within the same species, with high accuracy.
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