Has chemotactic activity for neutrophils. Contributes to neutrophil activation during inflammation (By similarity). Hematoregulatory chemokine, which, in vitro, suppresses hematopoietic progenitor cell proliferation. KC(5-72) shows a highly enhanced hematopoietic activity. By platelet-derived growth factor. In lung, by lipopolysaccharide or inflammation (By similarity). The N-terminal processed form KC(5-72) is produced by proteolytic cleavage after secretion from bone marrow stromal cells. Belongs to the intercrine alpha (chemokine CxC) family.