A study led by UC Berkeley researchers identifies specific gene expression changes in a species of water flea in response to contaminants, lending new support for the role of toxicogenomics in environmental monitoring.<br><br><a href='http://www.berkeley.edu/news/media/releases/2006/12/20_waterflea.shtml' target='_blank'>http://www.berkeley.edu/news/media/releases/2006/12/20_waterflea.shtml</a><br><br>