The ubiquity of the endocrine-disrupting chemical bisphenol A led researchers to ask what it might be doing in publicly supplied, chlorinated drinking water. The answer: Chlorinated BPA has different, but no less profound effects on cell-signaling networks than unmodified BPA. “We found that when you modify the BPA it works just as dramatically but in different ways on the same systems,” said UTMB professor Cheryl Watson, senior author of a paper on the study now online in Endocrine Disruptors. The news also appears in Bio-Medicine, Science Codex, Red Orbit and the Democratic Underground.