Fig. 5From: Enrichment of the embryonic stem cell reprogramming factors Oct4, Nanog, Myc, and Sox2 in benign and malignant vascular tumorsRepresentastive images of Klf4 staining in normal and vascular tumor tissues. Immunopositivity for Klf4 protein is represented by brown staining. Positive control (left panel) = human intestine; negative control (right panel) = human intestine with no added primary antibody. 400× total magnification for each imageBack to article page