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pnp (purine nucleoside phosphorylase) gene expression in Xenopus laevis embryos, NF stage 10.5, as assayed by in situ hybridization, vegetal view, dorsal up.
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pnp (purine nucleoside phosphorylase) gene expression in Xenopus laevis embryos, NF stage 15, as assayed by in situ hybridization, (D) dorsal view, anterior right; (e) transeverse section as indicated.
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pnp (purine nucleoside phosphorylase) gene expression in Xenopus laevis embryos, NF stage 28, as assayed by in situ hybridization, lateral view, anterior left, dorsal up.
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