To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S3. Experimental observations of the two scenarios of defect annihilation with perpendicular and parallel approach highlighted by red and blue arrows, respectively. The data correspond to an average filament length of 2 μm. Interplay of structure, elasticity, and dynamics in actin-based nematic materials Rui Zhang, Nitin Kumar, Jennifer L. Ross, Margaret L. Gardel, and Juan J. de Pablo PNAS. 2017. 115:E124-E133 DOI: 10.1073/pnas.1713832115 Download Original Video Browse All Videos »