Chemotactic for resting T-lymphocytes, and eosinophils (PubMed:15647285). Has lower chemotactic activity for neutrophils but none for monocytes and activated lymphocytes. Is a strong suppressor of colony formation by a multipotential hematopoietic progenitor cell line. Binds to CCR3 (By similarity). Highest expression in jejunum and spleen. Lower levels found in liver and lung. No expression detected in kidney, thymus, brain or testis. By interleukin-4 and allergen challenge with A.fumigatus (PubMed:11067944). By interleukin-13 (IL13) (PubMed:15647285). No visible phenotype in normal conditions (PubMed:15647285). Mice display a normal base-line eosinophil levels in the hematopoietic tissues and gastrointestinal tract (PubMed:15647285). However, following intratracheal IL13 administration, mice show a profound reduction in airway eosinophilia (PubMed:15647285). Belongs to the intercrine beta (chemokine CC) family.