title: Electron microscope analysis of amplifying ribosomal DNA from Xenopus laevis.
mesh_terms: D000818:Animals; D004247:DNA; D004261:DNA Replication; D004270:DNA, Circular; D005796:Genes; D009690:Nucleic Acid Conformation; D012335:RNA, Ribosomal; D014981:Xenopus
chemical_list: D004270:DNA, Circular; D012335:RNA, Ribosomal; D004247:DNA