Figure 3

Loss of lef1 leads to absent foxP2 expression in the tectum, mid-hindbrain boundary, and hindbrain. Whole-mount in situs at 36 hpf; anterior to left, dorsal up, eyes removed. Scale bar = 50 μm. (Conditions: hs:Δtcf, Tg(hsp70l:Δtcf-GFP)^w26; lef1 mo, lef1 morphants; wt, wild type; x8, homozygous Df(LG01)^x8. Abbreviations: hb, hindbrain; mhb, mid-hindbrain boundary; tec, tectum; tel, telencephalon.) (A, B) lef1 morphant (B) lacks expression in tectum, MHB, and hindbrain (arrows), compared to wild-type (A). (C) Df(LG01)^x8 homozygote lacks expression in tectum, MHB, and hindbrain (arrows). (D) Tg(hsp70l:Δtcf:GFP)^w26 embryo, three hours post-heat shock, lacks expression in tectum, MHB, and hindbrain (arrows). (E, F) mbx in situs; staining in tectum and hindbrain is indistinguishable between wild type and lef1 morphants (F).