Literature DB >> 6701086

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

E Back, H Felder, F Müller, H Tobler.   

Abstract

The two main rDNA size classes of 8.8 kb and 8.4 kb length from Ascaris lumbricoides, which comprise more than 95% of the total nuclear rDNA, are arranged as internally homogeneous clusters and are not intermingled with each other. The rRNA genes are present on a single autosomal locus as could be demonstrated by in situ hybridization of fluorochrome-labelled 18S and 26S rRNA to metaphase chromosomes of spermatocytes I. The quantitative ratio of the two rDNA size classes varies largely between individuals being on the average roughly 10:1 in the investigated wild population of A. lumbricoides. However, there are no differences in the hybridization pattern of the two rDNAs in the DNA eliminating nematode A. lumbricoides between germ line and somatic cells in any of the individuals that have been analyzed.

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Year:  1984        PMID： 6701086      PMCID： PMC318580          DOI： 10.1093/nar/12.3.1333

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


  23 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.  Complexity of germline and somatic DNA in Ascaris.

Authors:  K B Moritz; G E Roth
Journal:  Nature       Date:  1976 Jan 1-8       Impact factor: 49.962

3.  Molecular aspects of chromatin elimination in Ascaris lumbricoides.

Authors:  H Tobler; K D Smith; H Ursprung
Journal:  Dev Biol       Date:  1972-02       Impact factor: 3.582

4.  Ribosomal RNA genes in germ line and somatic cells of Ascaris lumbricoides.

Authors:  H Tobler; E Zulauf; O Kuhn
Journal:  Dev Biol       Date:  1974-12       Impact factor: 3.582

5.  Unequal crossover and the evolution of multigene families.

Authors:  G P Smith
Journal:  Cold Spring Harb Symp Quant Biol       Date:  1974

6.  The ribosomal DNA of Drosophila melanogaster is organized differently from that of Drosophila hydei.

Authors:  R S Hawley; K D Tartof
Journal:  J Mol Biol       Date:  1983-01-25       Impact factor: 5.469

7.  Visualization of nucleolar organizer regions im mammalian chromosomes using silver staining.

Authors:  C Goodpasture; S E Bloom
Journal:  Chromosoma       Date:  1975-11-20       Impact factor: 4.316

8.  Karyotype analysis of Ascaris lumbricoides var. suum. Male and female pachytene nuclei by 3-D reconstruction from electron microscopy of serial sections.

Authors:  P Goldstein; P B Moens
Journal:  Chromosoma       Date:  1976-10-28       Impact factor: 4.316

9.  Morphology and behaviour of sex chromosomes during meiosis in Ascaris suum.

Authors:  T Mutafova
Journal:  Z Parasitenkd       Date:  1975-07-16

10.  Similarities and differences in the structure of X and Y chromosome rRNA genes of Drosophila.

Authors:  K D Tartof; I G Dawid
Journal:  Nature       Date:  1976-09-02       Impact factor: 49.962
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  5 in total

1.  Type I-like intervening sequences are found in the rDNA of the nematode Ascaris lumbricoides.

Authors:  H Neuhaus; F Müller; A Etter; H Tobler
Journal:  Nucleic Acids Res       Date:  1987-10-12       Impact factor: 16.971

2.  The two main rDNA size classes of Ascaris lumbricoides: comparison of transcription termination and spacer organization.

Authors:  E Müller; H Neuhaus; H Tobler; F Müller
Journal:  Nucleic Acids Res       Date:  1992-06-25       Impact factor: 16.971

3.  The ribosomal RNA genes of three salmonid species.

Authors:  E M Popodi; D Greve; R B Phillips; P J Wejksnora
Journal:  Biochem Genet       Date:  1985-12       Impact factor: 1.890

4.  Localization of the in vivo and in vitro transcription initiation site and comparative analysis of the flanking sequences in the two main size classes of Ascaris lumbricoides rDNA.

Authors:  G Briner; E Müller; H Neuhaus; E Back; F Müller; H Tobler
Journal:  Nucleic Acids Res       Date:  1987-08-25       Impact factor: 16.971

5.  Intervening sequences in the ribosomal RNA genes of Ascaris lumbricoides: DNA sequences at junctions and genomic organization.

Authors:  E Back; E Van Meir; F Müller; D Schaller; H Neuhaus; P Aeby; H Tobler
Journal:  EMBO J       Date:  1984-11       Impact factor: 11.598
  5 in total

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