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MAR456 enhancer expression. (a) UCSC Genome Browser snapshot showing the mouse HoxD genomic locus along with the mastomys and therian accelerated regions tracks. (b) Representative transgenic embryo showing MAR456 enhancer activity for either the mouse or the mastomys sequence at E11.5 and E13.5. Zoom in of the mammary gland expression (red arrow) for the E13.5 embryos are shown in the right panel.
