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Procentriole structure

Procentriole structure

Visualization of the initial procentriole structures by cryo-electron tomography. (a), Central structure of the cartwheel (boxed) and connecting stalk (arrow). (b), Magnified view of the boxed region in (a) (projection of 23 images). (c), The connecting stalk (box in left panel) is observed in the absence of a procentriole. (d), Magnified view of the boxed region in (c). Scale bars, 100 nm (a, c) and 20 nm (b, d). (Adapted from Guichard et al., EMBO J. 2010)