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Fig. 5. Chemotaxis of neutrophils to fMLP and IL-8 on VCAM-1. (A) Effect of different substrata on the number of cells migrating towards (white bars) and away (black bars) from fMLP and IL-8. (B) Chemotactic index (C.I.) of cells migrating to fMLP and IL-8. (C) Speed of migration to fMLP and IL-8. (D) Paths of ten representative cells migrating to fMLP (left) and IL-8 (right) on VCAM-1. Scale is in µm. Results are shown as mean±s.e.m., n=5 for panels A,D; n=3 for panels B,C. *P<0.05 compared to migration on serum protein.