Jun 17, 2015
Colony-forming mouse embryonic stem cells growing on a fibroblast feeding layer. Nuclei of stem stains stained with Hoechst 3342, a nuclear marker, and for Oct4, a marker of pluripotency. Fibroblasts are stained, in red, for cytokeratin. Image property of PerkinElmer, Inc.
Image taken from: http://www.perkinelmer.com/pages/020/cellularimaging/researchareas/stemcellresearch.xhtml