Surface rendering (stereo view) representation of the three-dimensional structure of the C. reinhardtii flagellum. The representation includes the A-microtubule, outer dynein arms (light blue), inner dynein arms (red), the IC–LC of the inner dynein arms (yellow), the DRC (green), and radial spokes (RS; blue) colored based on Porter (1996) within a 96-nm repeat. AAA rings of the three heavy chains in one outer dynein arm are also indicated. The black arrowhead indicates the candidate of nexin.