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Formation of mesodermal pattern by secondary inducing interactions

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Summary

A highly purified vegetalizing factor induces endoderm preferentially in amphibian gastrula ectoderm. After combination of this factor with less pure fractions, a high percentage of trunks and tails with notochord and somites are induced. The induction of these mesodermal tissues depends on secondary factors which may act on plasma membrane receptors of the target cells. The secondary factors are probably proteins as they are inactivated by trypsin or cellulose-bound proteinase K. They are not inactivated by thioglycolic acid.

The implication of these findings for tissue determination and differentiation in normal development in relation to the anlageplan for endoderm and mesodermal tissues is discussed.

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References

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Asahi, K., Born, J., Tiedemann, H. et al. Formation of mesodermal pattern by secondary inducing interactions. Wilhelm Roux' Archiv 187, 231–244 (1979). https://doi.org/10.1007/BF00848619

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Key words

  • Amphibia
  • Mesoderm formation
  • Secondary factors