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Literature DB >> 652524

Differently sized rDNA repeating units of Xenopus laevis are arranged as internally homogeneous clusters along the nucleolar organizer.

N Junakovic, A Poretti, F Amaldi, M Buongiorno-Nardelli.

Abstract

The organization of differently sized genes coding for rRNA in Xenophus laevis has been investigated by partial EcoRI or HindIII digestion. The electrophoretic patterns obtained revealed that most adjacent repeating units are equally sized. This conclusion is in agreement with a previous suggestion that the nucleolar organizer is made up of internally homogeneous blocks of rRNA genes.

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Year: 1978 PMID： 652524 PMCID： PMC342081 DOI： 10.1093/nar/5.4.1335

Source DB: PubMed Journal: Nucleic Acids Res ISSN： 0305-1048 Impact factor: 16.971

11 in total

1. Evolution of repeated DNA sequences by unequal crossover.

Authors: G P Smith
Journal: Science Date: 1976-02-13 Impact factor: 47.728

2. Arrangement of length heterogeneity in repeating units of amplified and chromosomal ribosomal DNA from Xenopus laevis.

Authors: P K Wellauer; R H Reeder; I B Dawid; D D Brown
Journal: J Mol Biol Date: 1976-08-25 Impact factor: 5.469

3. Amplification as a rectification mechanism for the redundant rRNA genes.

Authors: M Buongiorno-Nardelli; F Amaldi; P A Lava-Sanchez
Journal: Nat New Biol Date: 1972-08-02

4. The rolling helix: a model for the eukaryotic gene?

Authors: C A Thomas
Journal: Cold Spring Harb Symp Quant Biol Date: 1974

5. Size of ribosomal DNA repeating units in Xenopus laevis: limited individual heterogeneity and extensive population polymorphism.

Authors: M Buongiorno-Nardelli; F Amaldi; E Beccari; N Junakovic
Journal: J Mol Biol Date: 1977-02-15 Impact factor: 5.469

6. Mathematical models for the evolution of multigene families by unequal crossing over.

Authors: A S Perelson; G I Bell
Journal: Nature Date: 1977-01-27 Impact factor: 49.962

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

Authors: P K Wellauer; I B Dawid; D D Brown; R H Reeder
Journal: J Mol Biol Date: 1976-08-25 Impact factor: 5.469

8. Unequal mitotic sister chromatid exchange and disproportionate replication as mechanisms regulating ribosomal RNA gene redundancy.

Authors: K D Tartof
Journal: Cold Spring Harb Symp Quant Biol Date: 1974

Differently sized rDNA repeating units of Xenopus laevis are arranged as internally homogeneous clusters along the nucleolar organizer.

1. Evolution of repeated DNA sequences by unequal crossover.

2. Arrangement of length heterogeneity in repeating units of amplified and chromosomal ribosomal DNA from Xenopus laevis.

3. Amplification as a rectification mechanism for the redundant rRNA genes.

4. The rolling helix: a model for the eukaryotic gene?

5. Size of ribosomal DNA repeating units in Xenopus laevis: limited individual heterogeneity and extensive population polymorphism.

6. Mathematical models for the evolution of multigene families by unequal crossing over.

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

8. Unequal mitotic sister chromatid exchange and disproportionate replication as mechanisms regulating ribosomal RNA gene redundancy.

9. The structure and evolution of ribosomal and 5S DNAs in Xenopus laevis and Xenopus mulleri.

10. Replication and transcription of eukaryotic DNA in Escherichia coli.

Review 1. Satellite DNA and heterochromatin variants: the case for unequal mitotic crossing over.

2. Chromosomal arrangement of the two main rDNA size classes of Ascaris lumbricoides.

3. Polymorphism and stability in the histone gene cluster of Drosophila melanogaster.