F2 is effective against S. aureus. Survival of S. aureus Newman (A) or MRSA Sanger 252 (B) with vehicle control, 40 μM F2, and/or 10 μM LL-37, as indicated. (C) Survival of MRSA Sanger 252 after incubation with the indicated amount of F2 for 24 h. Bacteria were grown for 24 h before assay in either 0 μM F2 (black bars) or 40 μM F2 (gray bars). $, no CFU recovered; #, a synergistic interaction (P < 0.05) by two-way ANOVA.