Interestingly, the rolling velocity of leukocyte in Fas<f/f>::Lyz2<Cre> mice was not reduced (Figure 1G), indicating a redundant function of TNF-α and CD95 in modulation of rolling velocity, similar to the redundancy previously reported in a model of traumatic brain injury in mice (Bermpohl et al., 2007). The gene discussed is FAS; the disease is brain injury.