Synopsis of dose-dependent gene expression of genes analyzed.

Patterns of dose-dependent up- (red arrows) and down-regulation (blue arrows) of the four classes of genes in the sea urchin, P. lividus, 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.