In 1885, Hans Driesch showed that both cells of a two-cell sea urchin embryo are able to develop into a complete sea urchin, demonstrating the totipotency of these cells. Pluripotency of vertebrates ...

We are interested in the role of the extracellular matrix in embryonic development. We have found that treatment of sea urchin embryos with chlorate, a competitive inhibitor of sulfation of ...