Interlocking and knotting of ring nucleoli in amphibian oocytes.
D000818:Animals; D002466:Cell Nucleolus; D002467:Cell Nucleus; D004261:DNA Replication; D005260:Female; D005796:Genes; D008858:Microscopy, Phase-Contrast; D010063:Ovum / Q000166:cytology*; D013045:Species Specificity; D014562:Caudata