White blood cell paddling proteins (VIDEO) Cell Press This video is under embargo. Please login to access this video. Caption This video shows imaging of the backward treadmilling of paddling molecules outside the cell. Credit TIRF microscopy: N Garcia-Seyda Usage Restrictions Credit Required. 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.