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(A) Immunostaining analysis of E13.5 control and mutant embryonic sections with an anti-SOX2 antibody. Enlarged images of the squared areas are shown at the middle and right. (B) Same as A except that E12.5 embryonic sections were analyzed. The images are representative of 4 (A) or 3 (B) experiments. Scale bars: 500 μm (left), 100 μm (middle and right).
