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On the Cover: Dynamins are a family of large mechanochemical GTPases that are critical for intracellular membrane trafficking and organelle maintenance. ADL1Ap is one of five genes in Arabidopsis that encode members of the plant-specific 68-kD dynamin subfamily. On the cover is displayed a dividing Arabidopsis suspension-cultured protoplast undergoing cytokinesis. The duplicated nuclei (blue) were labeled with the fluorescent DNA binding dye, DAPI. Phragmoplast microtubules and ADL1Ap were labeled by indirect immunofluorescence microscopy using specific -tubulin and ADL1Ap-specific peptide antibodies and visualized by green and red fluorophore-conjugated secondary antibodies, respectively. ADL1Ap is concentrated at the equatorial plane of the formation, suggesting that this 68-kD dynamin-related protein functions in cell-plate membrane dynamics. In addition, Kang et al. (pp. 47-68) show by examining the phenotype of adl1A loss-of-function mutants that ADL1Ap is required for other processes critical for embryogenesis, seedling development and reproduction. (Image by C. Dickey with digital enhancement by L. Vanderploeg, Department of Biochemistry, University of Wisconsin, Madison)