title: Synthesis of ribosomal RNA during sea-urchin development.
mesh_terms: D000225:Adenine / Q000032:analysis; D000818:Animals; D003596:Cytosine / Q000032:analysis; D004447:Echinodermata; D005260:Female; D006147:Guanine / Q000032:analysis; D010063:Ovum / Q000166:cytology / Q000378:metabolism*; D010759:Phosphorus Isotopes; D012313:RNA / Q000032:analysis / Q000096:biosynthesis*; D012270:Ribosomes / Q000378:metabolism*; D013395:Sucrose; D014316:Tritium; D014461:Ultracentrifugation; D014498:Uracil / Q000032:analysis; D014529:Uridine / Q000378:metabolism
chemical_list: D010759:Phosphorus Isotopes; D014316:Tritium; D014498:Uracil; D013395:Sucrose; D006147:Guanine; D012313:RNA; D003596:Cytosine; D000225:Adenine; D014529:Uridine