s Hippocampus of 3 month J20 Mice Synaptophysin PSD95 Dentate Gyrus co 150— o_ + 100- .(% _c a_ 50- cr) 0 a_ 1* 0 ** CA1 CA3 DG WT El J20 N=3 per genotype "*P <0.01 for CA1 by Bonferroni post-test EFTA00799251 Early, Region-Specific Upregulation of Complement Cl q As early as 1 m