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Figure 2   Two nine-week human fetuses stained for the presence of the distal-less (DLX3) protein. (A) Presence of the DLX3 protein (arrow) in a fetus that became an outie. (B) No expression of DLX3 (arrow marking umbilicus) in the fetus destined to become an innie. (After Keats and Keats, 1998).
Figure 2
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