To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 shows a 3D-isosurface rendering of the averaged CA of the fap70 axoneme. The video begins and ends with a cross-sectional view of the CA as seen from the base of the flagellum. Chlamydomonas FAP70 is a component of the previously uncharacterized ciliary central apparatus projection C2a Yuqing Hou, Lei Zhao, Tomohiro Kubo, Xi Cheng, Nathan McNeill, Toshiyuki Oda, and George B. Witman J Cell Sci 2021. 134:None-None; doi: 10.1242/jcs.258540 Download Original Video