β-galactosidase expression activated by B6.EIIa-cre at embryonic day 15.5
 A) E15.5 head at 2X magnification. β-gal expression is variable in all parts of the head. |
 B) β-gal expression is moderate in the developing brain (20X magnification). |
 C) A wider view of the developing brain from B (10X magnification). |
 D) β-gal expression is also moderate and variable in the developing eye (20X magnification). |
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