To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 7 Kinesin-5 Kip1 is a bi-directional motor that stabilizes microtubules and tracks their plus-ends in vivo V. Fridman, A. Gerson-Gurwitz, O. Shapira, N. Movshovich, S. Lakamper, C. F. Schmidt, and L. Gheber J Cell Sci 2013. 126:4147-4159; doi: 10.1242/jcs.125153 Download Original Video