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Fig. 1. Whole-mount in situ analysis of XHRT1, esr9,
esr10, Xhairy1 and Xhairy2b expression in
comparison with X-Delta-1 and xWT1 in the pronephros region
(arrowheads) of early tailbud stage embryos. Nieuwkoop-Faber stages are
indicated (Nieuwkoop and Faber,
1967). (A-D) Comparison of the expression of XHRT1,
X-Delta-1 and xWT1 in stage 20 embryos. (A) Whole embryo,
lateral view, anterior right. (B-D) Transversal sections. XHRT1
expression coincides with that of xWT1 around the pronephros anlagen
and surrounds that of X-Delta-1. (E-N) Comparison of the
expression of XHRT1, esr9, esr10, Xhairy1 and Xhairy2b in
stage 22-23 embryos. (E,G,I,K,M) Whole embryos, lateral views, anterior right.
(F,H,J,L,N) Transversal sections. Note that esr9 and esr10
are co-expressed with XHRT1 around the dorsal border of the
pronephros anlagen, and that Xhairy1 and Xhairy2b expression
is detected in both mesodermal layers and in the ectoderm. e, ectoderm; pn,
pronephros; l, lateral intermediate mesodermal layer; m, medial intermediate
mesodermal layer.