To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S5 Vigorous swimming of sperms from a control sibling male mouse at 12 weeks. Samples from 3 male mice were observed. Axonemal dynein assembly requires the R2TP complex component Pontin Yuanyuan Li, Lu Zhao, Shiaulou Yuan, Jiefang Zhang, and Zhaoxia Sun Development 2017. 144:4684-4693; doi: 10.1242/dev.152314 Download Original Video