Recombinant Human CXCL6/GCP‑2 (Catalog # 333-GC) chemoattracts the BaF3 mouse pro‑B cell line transfected with human CXCR2 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 CXCL6/GCP‑2 (80 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Human CXCL6/GCP‑2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF333). The ND50 is typically 0.8‑4.0 µg/mL.