Walking Molecule (2 of 2) (IMAGE) University of California - Riverside Caption This image shows a quadrupedal molecular machine using a pacing gait -- both legs on one side of the molecule move together, followed next by the two legs on the opposite side of the molecule. Credit Bartels lab, UC Riverside. Usage Restrictions None 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.