Surface density of adherent neutrophils at 20 s⁻¹ on polymer surfaces preadsorbed with 100 pmol/mL of (A) HK and (B) HKa. (□) Adhesion studies using untreated (non-fMLP activated) neutrophils and (▪) adhesion studies using fMLP-activated neutrophils (n = 3). (*) indicates no adherent cells found. Error bars indicate the standard deviation of the mean. §P < .01 versus untreated neutrophil adhesion.