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We report a novel zygotic gene encoding a Xenopus endodermal nuclear factor, Xenf. Expression of Xenf starts at the late blastula stages and is decreased after gastrulation. Xenf shows no structural homology to any known proteins. When GFP-tagged Xenf is overexpressed in Xenopus cells, Xenf protein is localized to the nucleus, associating closely with the chromosomes. In animal cap assays, Xenf expression...
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