The molecular basis for length heterogeneity in ribosomal DNA from Xenopus laevis.

Animals Cells, Cultured Chromosome Mapping Clone Cells DNA/metabolism DNA Restriction Enzymes Escherichia coli/enzymology Microscopy, Electron Molecular Weight Nucleic Acid Conformation Nucleic Acid Denaturation Nucleic Acid Hybridization Nucleic Acid Renaturation Plasmids Ribosomes/metabolism Xenopus

DNA DNA Restriction Enzymes