Chemotactic Factors, Eosinophil

**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.

**Tree numbers:** - D23.125.320

**Synonyms:** - Eosinophil Chemotactic Factors - Eosinophil Chemotaxins