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Fig. 4. Developmental expression of Xrx1 by radioactive in situ hybridization on sections.
Panels (A-D), dark fields;
(A'-D') respective bright fields.
(A) Transversal section of a stage 20 embryo, showing Xrx1 expression in the optic vesicles and in the floor of the forebrain.
(B) Transversal section of a stage 28 embryo. The expression in the optic cups covers both the neural retina (nr) and the pigmented epithelium (pe). The arrow indicates the expression in the hypophysis.
(C) Longitudinal section of a stage 34 embryo. The arrow shows the rostral limit of Xrx1 expression in the chiasmatic ridge.
(D) Horizontal section of a stage 35/36 embryo, showing the lack of Xrx1 expression in the lens (L).
Abbreviations:
di, diencephalon;
ep, epiphysis (pineal gland);
f, forebrain;
h, hypophysis;
L, lens;
m, mesencephalon;
nr, neural retina;
ov, optic vesicle;
pe, pigmented epithelium;
ph, pharynx;
t, telencephalon. |
