Abstract
An anastomosing network of extracellular fibrils on the inner surface of the ectoderm layer of amphibian gastrulae has been shown to provide an adequate substratum for attachment and migration by the mesodermal cells. These fibrils contain fibronectin as shown by immunostaining at the light and electron microscope levels. Now we report the presence of laminin, another cell adhesion glycoprotein, as a fibrillar network on the inner surface of the ectoderm layer in gastrulae of the Japanese newt (Cynops pyrrhogaster), but its absence on the blastula ectoderm layer, by the immunofluorescent staining using an antiserum specific for mouse laminin. The same antiserum was shown to stain basement membranes of adult newt organs as expected.
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