(IMAGE) University of Vienna Caption This is a detailed structure of an alpha-actinin dimer. The head is shown in red, the neck is in yellow and the L-shaped parts are displayed in purple and blue. The blue domain is bound to the titin-like motif of the neck region of the opposing molecule. The rod-shaped body is made up of helical structures (green), aligned in a zigzag and resembling fusilli pasta. Credit Copyright: Kristina Djinovic-Carugo, MFPL Usage Restrictions The image may only be used with appropriate caption or credit. License Licensed 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.