Figure 4

Hierarchical clustering of genes that were differentially expressed in the Tg vs . wt hippocampi during the “aging stage” (9, 14.5, and 20 month old). The clusters are further subdivided into differing gene expression patterns across age of both Tg and wt mice. A further subdivision of the clusters was made based on whether the gene expression levels for the Tg hippocampi were higher at 9 months than those for the wt (see text for full description).