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Two-color WISH expression analysis of E8.5 wildtype (a,c), and Msgn1−/− (b,d) embryos for the expression of Fgf8 (orange) and Ripply2 (purple) (a,b) and Uncx4.1 (orange) and Mesp2 (purple) (c,d). All views are lateral, and embryos are oriented with anterior to the left. Scale bar = 100 μm.
