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Figure 1


Fig. 1. Ci-sFRP1/5 marks the difference between anterior and posterior ectoderm. In situ hybridization for Ci-sFRP1/5 at the 64-cell stage on whole embryos (A, animal view, anterior towards the left), whole animal explants (B), anterior animal a-line explants (C) and posterior animal b-line explants (D) explanted at the eight-cell stage. The scheme to the left illustrates an eight-cell stage embryo in lateral view. a- and b-line cells are shown in red and green, respectively.