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Fig. 5. vHnf1 is required to define r4/r5 gene expression boundary in
mouse embryos. (A,B) Dorsal and lateral views of Hoxb1 expression in
wild-type and conditional vHnf1/ embryos.
The normal r4/r5 boundary of Hoxb1 expression is indicated in
wild-type embryos. vHnf1/ embryos exhibit
expansion of Hoxb1 expression posterior to the r4/r5 boundary in the
hindbrain (brackets).