chiral helices (IMAGE) DOE/Pacific Northwest National Laboratory Caption Chun-Long Chen and his team developed a way to control the shape of the peptoid helix. Credit Chun-Long Chen | Pacific Northwest National Laboratory Usage Restrictions No restrictions. License Public Domain 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.