title: The lack of cell contact causes genomic activation in early sea urchin embryos.
mesh_terms: D000818:Animals; D002450:Cell Communication; D002499:Centrifugation, Density Gradient; D005786:Gene Expression Regulation; D012313:RNA / Q000096:biosynthesis; D012617:Sea Urchins / Q000196:embryology / Q000235:genetics*
chemical_list: D012313:RNA