3-D P-glycoprotein (image) Southern Methodist University Caption Purple and blue helices, yellow ribbons and turquoise coils form the backbone skeletal structure of the human multi-drug resistance protein. A newly identified inhibitor binds to one of the pump's two ATP binding sites (dark blue). In motion at http://bit.ly/Lncc6T. Credit John Wise, SMU Usage Restrictions Credit required 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.