Fig. 2.

Structural maps of the radial-spoke complex. (a) A z-axis slice from the tomogram showing the array of radial spokes on a microtubule doublet. (b) A sub-volume extracted from the tomogram without any pre-reconstruction processing. (c) The same sub-volume as (b) after non-linear denoising by bilateral filtering. (d) The same sub-volume after low-frequency band-pass filtering, having an appearance very similar to (c). (e) A sub-volume with a missing wedge (as shown in Fig. 2g), from the same tomogram, after low-frequency band-pass filtering. (f) The Fourier missing-wedge corresponding to the sub-volume in Figs. 2b, 2c and 2d. (g) The missing wedge of the sub-volume in Fig. 2e