Chemotactic factor that attracts monocytes and eosinophils, but not neutrophils. Augments monocyte anti-tumor activity. Also induces the release of gelatinase B. This protein can bind heparin. Binds to CCR1, CCR2 and CCR3. Monomer. Interacts with TNFAIP6 (via Link domain). O-glycosylated. Belongs to the intercrine beta (chemokine CC) family. CCL7 entry