Figure 12.
end-1 transcript expression in wild-type embryos. In situ hybridization shows that
end-1 mRNA is expressed only in the E lineage.
end-1 mRNAs are first detected in the E cell of an eight-cell embryo (A). Expression is also seen in Ea and Ep of a 15-cell embryo (B) and in the four granddaughters of E in an ~50-cell embryo (C). The arrowheads point to E and its descendants. Anterior is at the left, and dorsal is at the top.