Definition: Substances elaborated by specific strains of bacteria that are lethal against other strains of the same or related species. They are protein or lipopolysaccharide-protein complexes used in taxonomy studies of bacteria.
pediocin PA-1 from Pediococcus acidilactici PAC-1.0; a 4.6 kDa peptide with 44 amino acids; exhibits antibacterial activity against several gram-positive bacterial strains; amino acid sequence given in first source