Optical tweezers with rotator bead (image) DOE/Lawrence Berkeley National Laboratory Caption In this optical tweezer set-up, the packaging complex is tethered between two beads and coupled to a rotor bead via dsDNA. The middle image is a micrograph of the set-up and on the right is an image of the rotor bead position during packaging. Credit Courtesy of Bustmante Group 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.