SULFATE 1 (IMAGE) Rice University Caption A graphic shows how Rice University chemists used a rare genetic pathway to metabolically engineer cells that serve as drug factories to make thrombin inhibitors that break up blood clots. The study began with a bioinformatic survey that found the key in a crested ibis. Credit Xiao Lab/Rice University Usage Restrictions NONE License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.