Gene expression profiles of age and experience categories.

<p>Single factor hierarchical clustering of expression profiles; red indicates increased expression, blue indicates decreased expression (as compared to the mean standardized expression taken over all genes and treatments). Three distinct clusters were found, and are identified by the color bars on the right. These clusters are discussed in the text. Full gene names are listed in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0006150#pone-0006150-t001" target="_blank">Table 1</a>.