Infiltrating macrophage/activated microglial (R2) gene expression as determined using the 32 × 3 Custom RT2 Profiler PCR array. Gene expression, for the 24 and 72 h time point groups, is given as fold regulation, compared to the control naive group, for complement components (A), MHC class I and II antigens (B), chemokines (C), cytokines (D), and other genes (E) with expression increased more than twofold from control. Note the changes in scale for the y-axis from graph to graph.