Definition: Cytotaxins liberated from normal or invading cells that specifically attract eosinophils; they may be complement fragments, lymphokines, neutrophil products, histamine or other; the best known is the tetrapeptide ECF-A, released mainly by mast cells.
chemotactic substances attracting eosinophils, not liberated by eosinophils; /biosyn /physiol permitted; DF: ECF A
ExamplesN-Formylmethionine Leucyl-Phenylalanine