... (R-Smads, Smad1, -2, -3, -5 and -8), which,upon phosphorylation, are activated and bind to a common mediator Smad (Co-Smad, Smad4). The complexes move into the nucleus and act asregulators of ... zebra-fish was also shown to possess Chordin cleavageactivity [26]. The transcripts are detected throughout the early gastrula stage embryo but toward the end of gastrulation, the accumulation of ... throughout the embryo at a basal level (Fig. 2), whereas smad1 transcripts areonly detected from 80% epiboly. As sbn and swr[17], and sbn and snh [5], interact genetically, the bmp2b and bmp7 signals...