CCL21 and infection: Of the ~350 members of the mouse Slc gene family with detectable expression in meningeal cells, 37 show infection-dependent changes in transcript abundance in one or more meningeal cell types by snRNAseq, with 21/37 down-regulated and 6/37 up-regulated by log2-fold>0.25 following infection (Figure 3—figure supplement 4).