Semantic Scholar uses AI to extract papers important to this topic.
Nitric oxide (NO) signaling repressively regulates metamorphosis in two solitary ascidians and a gastropod. We present evidence… Expand The ER of eggs of the sea urchin Lytechinus pictus was stained by microinjecting a saturated solution of the fluorescent… Expand Although the regulation of events in the cell division cycle by calcium or other cations has been the subject of much interest… Expand When a sperm activates a sea urchin egg at fertilization, it triggers the release of calcium from a store within the egg by a… Expand Cleavage in embryos of the sea urchin Arbacia punctulata consists of eight very rapid divisions that require continual protein… Expand Abstract Sulfated macromolecules have been implicated in many morphogenetic activities, including cell migration and gastrulation… Expand We have cloned and characterized members of a small multigene family that encodes late-stage histone H3 and H4 mRNAs from the sea… Expand Sea urchin sperm before fertilization possess the longest nucleosome repeat length yet determined for any chromatin. By the time… Expand The sea urchin shows an immune response to grafted tissue similar to that found in vertebrates. Unrelated animals rejected… Expand Abstract The putative histone H4 (F2a1) mRNA has been isolated from early blastula Strongylocentrotus purpuratus sea urchin… Expand