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Coleoptericin

(Science: protein) Inducible antibacterial peptide found in the haemolymph of a tenebrionid beetle following the injection of heat killed bacteria.

peptide a (glycine rich, 74 residues) is active against gram-negative bacteria, peptides B amp, c are isoforms of a 43 residue cysteine rich peptide that has sequence homology with defensins and is active against gram-positive bacteria.

See: diptericins, cecropins, apidaecins, abaecins.