Fig 5.

Wnt2 subfamily gene expression in mouse and chick embryos at stages indicated. Main images are external views (volume rendered) of whole embryos following three-dimensional imaging (OPT): mouse Wnt2 (A, E, and I); chick Wnt2 (B, F, J, and M); chick Wnt2b (C, G, K, and N); mouse Wnt2b (D, H, and L). Longitudinal virtual sections through the left forelimb are shown inset in (I and K); (I) is a midline section along the dorso-ventral axis, (K) is posterior of midline in order to show the expression. (M and N) show frontal views of the head highlighting expression (pseudocolored green on-line) in the telencephalon. Scale bars indicate 2 mm and are indicative for each stage. Abbreviations: ba, branchial arches; boa, base of amnion; bw, body wall; dml, dorsal midline; e, eye; fl, forelimb; ov, otic vesicle.