On the cover: Land plant cells lack centrosomes and do not usually generate the aster-shaped radial microtubule arrays typically seen in animal cell types that contain centrosomes. However, as Goto and Asada (pp. 753-761) report in this issue, similar microtubule arrays can be induced in tobacco cells by the over-expression of the plantspecific kinesin TBK5 as GFP-fusions. These arrays developed after expressed GFP-TBK5 fusion proteins assembled to form a single particle that apparently functions as a microtubule organizing center. Interestingly, as the cover picture shows, this particle was always located in close proximity of the nucleus (n), like animal centrosomes. The aster-like appearance of the particle provides hints as to how the microtubule architecture was modified.
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