FIG. 4A Changes in cortical ER clusters at the site of sperm binding and incorporation.

Fluorescent micrograph of stage V-VI Xenopus laevis oocytes surrounded by thousands of follicle cells, as visualized by Hoechst staining.

FIG. 1B, 1B', 1B'' ER clusters are positioned under f-actin fenestrae in fixed and live oocytes.

Fig. 1A, 1A', 1A'' ER clusters are positioned under f-actin fenestrae in fixed and live oocytes.

How the cell cytoplasm is spatially organized is of fundamental interest. In ordinary animal cells the cytoplasm is organized by a radial array of microtubules, called an aster. Aster microtubules are...

FIG. 4H 4H' Changes in cortical ER clusters at the site of sperm binding and incorporation.

FIG.2D Changes in ER cluster morphology require gamete fusion.

FIG.2F Changes in ER cluster morphology require gamete fusion.

Light micrograph of human ovum (egg) and sperm. The ovum is much larger than the sperm and is surrounded by protective cumulus cells around the outside surface (yellow). The membrane surrounding the o...

Scanning electron micrograph of a hamster oocyte cumulus complex. Cumulus cells (purple) and matrix (gray) are shown. Small blood clots (red) also often appear in oocyte cumulus complexes. The red blo...