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Nature 1989 Sep 07;3416237:33-8. doi: 10.1038/341033a0.
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Interaction between peptide growth factors and homoeobox genes in the establishment of antero-posterior polarity in frog embryos.

The expression of the Xenopus homoeobox gene xhox3 is an early response to mesoderm induction by peptide growth factors and the level of xhox3 expression marks the antero-posterior character of the induced mesoderm. Different peptide growth factors specify different antero-posterior mesodermal cell fates as seen by the level of xhox3 expression and the capacity to induce specific secondary neural/epidermal structures. These factors and homoeobox genes thus form part of the mechanism necessary for establishing antero-posterior polarity in the frog embryo.

PubMed ID: 2570357
Article link: Nature

Species referenced: Xenopus laevis
Genes referenced: evx1