Sakacin P is an antimicrobial peptide that targets Gram-positive bacteria, such as Listeria monocytogenes, belonging to the class IIa bacteriocins. It shows negligible antibacterial activity against Gram-negative bacteria. Sakacin P exerts its antimicrobial effects by interacting with bacterial cell membranes and disrupting their integrity. It is useful in the food industry for studies on Listeria contamination and antibacterial agents.