To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 Spontaneous tail movements in RP-011 homozygous and control embryo. The DEAD-box RNA helicase Ddx39ab is essential for myocyte and lens development in zebrafish Linlin Zhang, Yuxi Yang, Beibei Li, Ian C. Scott, and Xin Lou Development 2018. 145:None-None; doi: 10.1242/dev.161018 Download Original Video