The movie illustrates two approaches to understanding the 3D structure of complex objects, using the pluteus stage embryo of the sea urchin Arbacia punctulata. The first sequence is a through-focus DI...

A normal X. laevis blastomere expressing three tandem GFPs fused to the ensconsin microtubule-binding domain (EMTB-3G; Faire et al., 1999). Single microtubules extend to the cortex, even in these larg...

Microtubules in sand dollar embryos expressing three tandem Cherry fluorophores fused to the ensconsin microtubule-binding domain (EMTB-3C). Video demonstrates microtubule dynamics during process of ...

This video shows the dynamics of the apical cell surface of individual cells of the enveloping layer in a killifish embryo. The fluorescent actin is seen to polymerize and depolymerize in cyclic waves...

Sixteen cell stage Zebrafish embryo. The first frame shows cells at metaphase. The sequence covers the next four cell cycles. In each prophase, there is a rapid onset of yolk platelet motility. Yolk m...

Zebrafish embryo at tailbud stage The sequence begins at the level of the axial hypoblast. The hypoblast has separated into paraxial and axial mesoderm. The axial mesoderm (chorda mesoderm) is the pre...

Neural plate of Xenopus laevis at early neural tube closure.

Confocal micrograph of the brain of a transgenic zebrafish embryo. Some neurons express the green fluorescent protein (GFP) - shown in green under the control of a specific promotor. Tracts, axons and...

The developing wing bud of a four day chick embryo showing the pattern of spinal nerves growing into it. The nerves are made visible by staining a specific neural protein (3AIO monoclonal antibody, wh...

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...