Receptor (image) Duke University Caption This ribbon diagram shows three ankyrin repeats, a common structure found in receptor proteins that sense either cold or hot temperatures. A Duke team has identified three single-point mutations that can invert temperature-sensitivity, turning a cold-sensor into a heat-sensor. All three of these mutations are located in on a single ankyrin repeat. Credit Grandl Lab, Duke University Usage Restrictions None 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.