 N-Formylmethionine-leucyl-phenylalanine

N"-Formylmethionyl-leucyl-phenylalanine (fMLF) or N"-formyl-met-leu-phe) is an "N"-formylated tripeptide and sometimes simply referred to as chemotactic peptide is a potent polymorphonuclear leukocyte (PMN) chemotactic factor and is also a macrophage activator.fMLF is the prototypical representative of the "N"-formylated oligopeptide family of chemotactic factors.