title: Mitochondrial DNA in Xenopus laevis oocytes. I. Displacement loop occurrence.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D004261:DNA Replication; D004270:DNA, Circular; D004272:DNA, Mitochondrial / Q000032:analysis / Q000378:metabolism*; D005260:Female; D008854:Microscopy, Electron; D010063:Ovum / Q000378:metabolism*; D014316:Tritium; D014981:Xenopus
chemical_list: D004270:DNA, Circular; D004272:DNA, Mitochondrial; D014316:Tritium