Quartile averages.

Panels A and B represent the first quartile for the low shear rate range (200-500 s⁻¹) and high shear rate range (500-1000 s⁻¹), respectively. Similarly, panels C and D represent the second quartile, E and F represent the third quartile, and G and H represent the fourth quartile for the low and high shear rate ranges, respectively. “Both” indicates Mac-1^−/−mice + LFA-1 mAb or LFA-1^−/− mice + Mac-1 mAb (pooled). Data presented as mean ± SEM. In both shear rate groups, rolling velocity in CD18^−/− mice was significantly higher than in all other groups (*). Other significant differences among groups are indicated by brackets above bars. WT indicates wild-type mice.