(A) Schematic representation of Chx10 fusions. EnR, Engrailed repressor domain; VP16, VP16 activator domain; HD, homeodomain.
(B) Immunohistochemical and in situ hybridization analyses in chick spinal cords electroporated (+ side) with EnR-Chx10 or with VP16-Chx10. EnR-Chx10 promotes the expression of V2aIN markers and inhibits MN specification, whereas VP16-Chx10 inhibits generation of both V2aINs and MNs. Ectopic V2aINs in the dorsal spinal cord and the MN area are marked with brackets.