Summary
Mesoderm-inducing activity can be extracted from eggs or whole ovary. It binds to heparin and can be heparin or anti-bFGF but not by anti-TGFbeta. Two be identified by Western blotting and have molecular 19 and 14K. The content in embryos is about 7unitsg-1 7ngml-1) which would be sufficient for it to be acting inducer of ventral mesoderm. Attempts to detect