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Fig. 17: microtubules guide trichocyst to docking sites

Fully formed trichocysts are moved from the cytosol to the cell surface along microtubules. In this image a bundle of microtubules (mt) arising from the proximal end of the basal body lies against the trichocyst membrane along its entire length. The membrane, in grazing section, and the electron-transparent zone are seen. Transport appears to occur tip first along this bundle of microtubules and moves the trichocyst in a direction toward the origin of the microtubular bundle. TM taken on 4/1/83 by R. Allen with Hitachi HU11A TEM. Neg. 14,750X. Bar = 0.25µm.

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