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Fig. 2. Dorsal interneuron development in Lhx1 and Lhx5 single
mutants. (A-C) Inactivation of either Lhx1 or Lhx5 does
not alter the specification of dILA interneurons. dILA
interneurons express Pax2 and Lhx5 in Lhx1-/- embryos (B),
or express Pax2 and Lhx1 in Lhx5-/- embryos (C).
(D-I) In both Lhx1 and Lhx5 single mutants,
dILA cells retain their GABAergic identity, and express
Viaat (D-F) and Gad1 (G-I). (J-O) Lhx1
expression is unchanged in the cord of Lhx5-/- mutants.
There is no upregulation of Lhx1 mRNA at early (not shown) or later
(arrows in J,L) stages. There is also no change in Lhx5 expression in
the cord of Lhx1-/- mutants at E12.5 (arrows in M,N).