title: Synthesis of ribosomal RNA in sea urchin embryos. V. Further evidence for an activation following the hatching blastula stage.
mesh_terms: D000818:Animals; D004247:DNA / Q000096:biosynthesis; D004586:Electrophoresis; D005314:Embryonic and Fetal Development; D008715:Methionine / Q000378:metabolism; D012313:RNA / Q000096:biosynthesis; D012335:RNA, Ribosomal / Q000096:biosynthesis*; D012617:Sea Urchins / Q000196:embryology*; D013997:Time Factors; D014316:Tritium
chemical_list: D012335:RNA, Ribosomal; D014316:Tritium; D012313:RNA; D004247:DNA; D008715:Methionine