Movie showing human stem cell colony migration.

Human embryonic stem cell colonies that have been stained for alkaline phosphatase (red). Alkaline phosphatase staining is used to show that the colonies are pluripotent. The colonies are growing on a...

Colorized scanning electron micrograph of a human embryonic stem cell (gold) growing on a layer of supporting cells (fibroblasts). Stem cells are derived from very early embryos and can either be grow...

Thick microtubule bundles are organized around the periphery of each stem cell in human embryonic stem cell colonies. Human embryonic fibroblasts were grown on a layer of mouse embryonic fibroblasts w...

z-series image of mouse ES cells with a multi-copy alpha-globin BAC insertion. H3K9me3 (blue) marks the heterochromatic core which largely colocalizes with combined FISH signal from the lac operator ...

Image shows a z-series immuno-FISH of a mouse ES cell carrying a multi-copy alpha-globin BAC insertion: HP1 gamma immunostaining (blue) is shown relative to BAC FISH signal (red) versus combined lac o...

Image shows a z-series of a mouse ES cell observed using 3D immuno-FISH. The ES cells carried a multi-copy insertion of an alpha-globin BAC. H3K9me3 immunostaining (red) is shown in comparison to vec...

Image shows a z-series of a mouse ES cell carrying a multi-copy alpha-globin BAC transgene array. Relative distribution of the BAC sequences, identified by DNA FISH (green) using the entire BAC as pr...

Image shows a z-series of a mouse ES cell carrying an alpha-globin BAC transgene array (clone 1c) hybridized with probes against the lac operator repeat (green) and the entire alpha-globin BAC sequenc...

Immunofluorescence image of Human Embryonic Stem cells stained with an antibody to the active form of Bax (red) and Hoechst (blue). The distribution of Bax, an apoptosis mediator indicates that it res...