The present invention relates to the antibacterial peptide planthalysin isolated from Lactobacillus plantanum and uses thereof. The five novel plantaricin peptides isolated from the Lactobacillus plantarum strain of the present invention exhibit strong antibacterial activity against pathogenic bacteria and can be applied to various bacterial infections, and the composition of the present invention can be used in medicine, food or It can be usefully used for antibacterial purposes in various fields such as feed additive composition.
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