[Immuno- and histochemistry characteristics of morula and test cells in three ascidian species].

One of the hypotheses suggests that test cells play a part in a larval tunic formation like morula cells in adult ascidians. It was shown that the antibodies against morula cell proteins of 26 and 48 kDa of the ascidian Styela rustica react on the paraffin sections with both the granules of morula cells and test cells of ascidians S. rustica and Boltenia echinata.