
Fig. 2. Morphology of Otx2
/Otx2
and Otx2
/- embryos. (A-J) When compared with wild-type (A,F), Otx2
/Otx2
embryos exhibited brain abnormalities, the majority of which were exencephaly, lack of closure of neural tube (B,G) or reduction of forebrain-midbrain (C,H); 90% of Otx2
/- embryos revealed a severe reduction of anterior CNS with an almost headless phenotype (D,I,J) and 10% of them a phenotype (E) similar to that of Otx2
/Otx2
mutants. Fb, forebrain; Hb, hindbrain; Mb, midbrain.