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Fig. 2. Colocalization analysis of Mgn expression with GABAergic
markers in the developing mesencephalon. (A-H) Expression of
Mgn (C,D) and Gad67 (E,F) in adjacent coronal (A,C,E,G) and
sagittal (B,D,F,H) sections of E12.5 mouse embryos. (A,B) Bright-field images.
(G,H) Superimposed images of the two adjacent sections hybridized in parallel
with Mgn (in yellow) and Gad67 (in blue) indicate that
Mgn and Gad67 are expressed in close vicinity but do not
colocalize. At E12.5, Mgn is expressed in the ventricular zone
underlying the mantle layer in which Gad65/67 expression arises.
However, no overlapping of the two expression domains can be observed. This
spatial relationship between the two expression domains is especially
intriguing in the developing mesencephalon (G), but also detectable in other
expression domains such as the ZLi (H). SC, superior colliculus; IC, inferior
colliculus; vMb, ventral midbrain.