Synthesis of ribonucleic acid by different regions of the early amphibian embryo.
D000818:Animals; D004625:Embryo, Nonmammalian / Q000378:metabolism*; D066298:In Vitro Techniques; D012313:RNA / Q000096:biosynthesis*; D013347:Subcellular Fractions; D014316:Tritium; D014461:Ultracentrifugation; D014529:Uridine; D014562:Caudata / Q000378:metabolism*
D014316:Tritium; D012313:RNA; D014529:Uridine