Distribution of Bib1, BubR1 and Mad2(red) on chromosomes assembled from sperm chromatin in nocodazole treated Xenopus oocyte extracts in vitro. Chromosomes are stained with DAPI (blue). Right panels ...

Effect of depletion of the Nup107-160 nucleoporin on spindles assembled in vitro with sperm chromatin and in Xenopus oocyte extracts. Spindles are labeled with tubulin (red) and chromosomes are staine...

Effect of depletion of Nup133 and Nup43 by antibody addition on spindle assembly on sperm chromatin in Xenopus oocyte extract. Spindles (red) were localized by addition of tubulin-rhodamine and chrom...

Time-lapse microscopy of mouse oocytes injected with a cRNA encoding YFP-TPX2 (targeting protein for Xenopus kinesin-like protein, xklp2), expressed at low levels. Up is the transmitted light and bott...

Time-lapse microscopy of histone-RFP expressing mouse oocytes injected with siCo-5h, a control siRNA. Images were taken every 20 minutes. Times after the resumption of meiotic maturation and germinal ...

Movie shows spindle assembly around DNA-beads in a Xenopus laevis egg extract. DNA beads are autofluorescent, and spindle is formed from exogenous X-rhodamine-labeled tubulin and alexa-488 labeled an...

Figs. 315 from Don Fawcett's Chapter 12 (Centrioles). The dense material that forms the capitulum and the cross-striated columns of the connecting piece in spermatozoa is formed in intimate associatio...

Figs. 311 & 312 from Don Fawcett's Chapter 12 (Centrioles). In ciliogenesis, newly formed single centrioles, serving as basal bodies, are arranged in rows and oriented perpendicular to the cell surfac...

Early transmission electron micrographs showing pore details in negatively stained preparations of nuclear envelopes. Upper panel shows the pronounced 8-fold symmetry in the closely spaced pores of t...

The sequences in this videotape illustrate the unusual crawling motility of the amoeboid sperm of the nematode parasite, Ascaris suum, an intestinal parasite of pigs. Ascaris sperm contain no myosins ...