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Figure Caption
Fig. 5 Induction of gata5 by a signal from the yolk cell. (A) Embryo at 60% epiboly with a grafted second yolk cell. gata5 is expressed in cells in association with both the host and the donor yolk cell (dyc). (B) A section through such a grafted embryo showing the additional layer of gata5-expressing cells (arrowhead). Normal gata5 expression in the host embryo is arrowed. The dark material in the donor yolk cell is dye injected prior to grafting to distinguish it from the host yolk cell (hyc). Scale bars, 150 μm (A); 40 μm (B).
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