The chemotactic agent N-formyl-L-methionyl-L-leucyl-L-phenylalanine (For-Met-Leu-Phe; fMLF) can be isolated from bacterial suspensions and can also be found in disrupted mitochondria [1, 2]. This small N-acyl tripeptide is the prototype and the most active component of a family of N-formyl-methionyl peptides that act as molecular switches capable to trigger the directional migration (chemotaxis) towards the infection sites of human ...
