Fig. 1From: Hypoxia increases genome-wide bivalent epigenetic marking by specific gain of H3K27me3Tumor hypoxia increases trimethylation at H3K4 and H3K27. Representative images of whole tumor parallel sections stained for pimonidazole (hypoxia marker, red) and CD31 (PECAM-1; endothelial cell surface marker, green; upper left), H3K27me3 (red) and CD31 (green; upper right), H3K4me3 (red) and CD31 (green; lower left); scale bar represents 1 mm. The color-merged image (lower right) shows pimonidazole (green) and H3K27me3 (red). Captions show enlargements of the indicated areas; scale bar represents 100 µmBack to article page