Synopsis of dose-dependent gene expression of genes analyzed.

<p>Patterns of dose-dependent up- (red arrows) and down-regulation (blue arrows) of the four classes of genes in the sea urchin, <i>P. lividus</i>, in the presence of the PUAs decadienal, heptadienal and octadienal. Genes with two arrows are up- and down-regulated at different concentrations. The arrows correspond to fold differences greater than ±2, considered significant levels of down- or up-regulation.</p>