Recombinant Human CCL1/I‑309 (Catalog # 272-I) chemoattracts the BaF3 mouse pro‑B cell line transfected with human CCR8 in a dose-dependent manner (orange line). The amount of cells that migrated through to the lower chemotaxis chamber was measured by Resazurin (Catalog # AR002). Chemotaxis elicited by Recombinant Human CCL1/I‑309 (0.02 µg/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Human CCL1/I‑309 Monoclonal Antibody (Catalog # MAB272). The ND50 is typically0.1‑0.5 µg/mL.