Fig. 3. Expression of DP1 in extra-embryonic and embryonic tissues. Conceptuses were stained immunohistochemically with an anti-DP1 monoclonal antibody (A,C,E,F) or mouse IgG (B,D,G,H). (A,B) Serial sections of a wild-type embryo at E7.5. (C-H) Serial sections of a wild-type embryo at E8.5. The regions in C,D indicated by a star and triangle are shown at higher magnification in E-H. Expression of DP1 occurs in the embryo (e), in the ectoplacental cone (epc) and in the chorion (ch). Additionally, despite the background seen with mouse IgG, clear nuclear expression of DP1 is visible in trophoblast giant cells (tg).

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