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Fig. 1. Distribution of anti-E-cadherin immunoreactivity in Xenopus gastrula. (A-C,G,1) Section corresponding to the
regions designed in the drawings (the left drawing is a sagittal section of the gastrula passing through the neural plate, the
solid line corresponds to the horizontal plane of section which gives rise to the right drawing). (D) Tangential section
through the gastrula ectoderm, (H) Transverse section through the neural plate. (E,F) Phase-contrast images corresponding
to B,C. In stage 13.5-14 Xenopus gastrula E-cadherin is present in most of the ectoderm (A,C,D,G) in the region of
cell-cell contact (D), the ectoderm overlying the neural plate (B.H) and in the region surrounding the yolk plug (I) is not
labeled. The mesoderm and the endoderm are negative. The region of the embryo expressing E-cadherin is indicated by
the chessboard filling in the summary drawings, ar, archenteron; bl, blastocoele; e, ectoderm; en, endoderm; m,
mesoderm; n, notochord; np, neural plate; yp, yolk plug. Magnification: A-C,I, x200; D, X500; G,H, xlOO. |
