 AMC-109 is a novel antimicrobial cationic tripeptid that has been shown to be effective against Staphylococcus aureus. It works by self-assembling into stable aggregates, which are able to penetrate the negatively charged membrane of S aureus, causing it to dissolve its membrane nano-domains and disrupt its functioning. This process mimics the effect of the disinfectant benzalconium chloride, but with greater selectivity towards bacteria.