Click here to close
Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly.
We suggest using a current version of Chrome,
FireFox, or Safari.
Chromosoma
1987 Jan 01;954:236-50. doi: 10.1007/bf00294780.
Show Gene links
Show Anatomy links
The lampbrush chromosomes of Xenopus laevis: preparation, identification, and distribution of 5S DNA sequences.
Callan HG
,
Gall JG
,
Berg CA
.
???displayArticle.abstract???
Details are given of a technique for making permanent preparations of the lampbrush chromosomes of Xenopus laevis. Stained preparations allow all 18 bivalent chromosomes to be identified, and a working map showing the major features has been constructed. Fifteen of the Xenopus chromosomes have one telomere conspicuously larger than the other; the two smallest chromosomes, and one other, lack large telomeres. Similar preparations, extracted with RNase and denatured, have been hybridized in situ with a 3H-labelled 5S cRNA probe. Chromosomes can be identified in the resulting autoradiographs. 5S DNA sequences are present at all the larger telomeres and at three of the smaller ones, but are absent from the telomeres at both ends of the two smallest chromosomes. There are also five interstitial sites of hybridization. At one of these, label is on the chromosome axis; at the other four, label extends well away from the axis.
Bonner,
Ecdysone-stimulated RNA synthesis in imaginal discs of Drosophila melanogaster. Assay by in situ hybridization.
1976, Pubmed
Bonner,
Ecdysone-stimulated RNA synthesis in imaginal discs of Drosophila melanogaster. Assay by in situ hybridization.
1976,
Pubmed
Diaz,
Giant readthrough transcription units at the histone loci on lampbrush chromosomes of the newt Notophthalmus.
1985,
Pubmed
Dumont,
Oogenesis in Xenopus laevis (Daudin). I. Stages of oocyte development in laboratory maintained animals.
1972,
Pubmed
,
Xenbase
Fedoroff,
The nucleotide sequence of oocyte 5S DNA in Xenopus laevis. I. The AT-rich spacer.
1978,
Pubmed
,
Xenbase
Fostel,
Chromosomal location of a major tRNA gene cluster of Xenopus laevis.
1984,
Pubmed
,
Xenbase
Gall,
Histone genes are located at the sphere loci of newt lampbrush chromosomes.
1981,
Pubmed
Guinta,
Early replication and expression of oocyte-type 5S RNA genes in a Xenopus somatic cell line carrying a translocation.
1986,
Pubmed
,
Xenbase
Harper,
Chromosomal mapping of Xenopus 5S genes: somatic-type versus oocyte-type.
1983,
Pubmed
,
Xenbase
Hutchison,
The mitotic chromosomes of Notophthalmus (=Triturus) viridescens: localization of C banding regions and DNA sequences complementary to 18S, 28S and 5S ribosomal RNA.
1975,
Pubmed
Jamrich,
Transcription of repetitive sequences on Xenopus lampbrush chromosomes.
1983,
Pubmed
,
Xenbase
Müller,
The lampbrush chromosomes of Xenopus laevis (Daudin).
1974,
Pubmed
,
Xenbase
Pardue,
Location of the genes for 5S ribosomal RNA in Xenopus laevis.
1973,
Pubmed
,
Xenbase
Pilone,
Chromosome location of the genes for 28S, 18S and 5S ribosomal RNA in Triturus marmoratus (Amphibia Urodela).
1974,
Pubmed
,
Xenbase
Pukkila,
Identification of the lampbrush chromosome loops which transcribe 5S ribosomal RNA in Notophthalmus (Triturus) viridescens.
1975,
Pubmed
,
Xenbase
Schultz,
In vitro RNA synthesis in oocyte nuclei of the newt Notophthalmus.
1981,
Pubmed
Tymowska,
Karyotype analysis of Xenopus muelleri (Peters) and Xenopus laevis (Daudin), Pipidae.
1972,
Pubmed
,
Xenbase
Wallace,
Protein incorporation by isolated amphibian oocytes. 3. Optimum incubation conditions.
1973,
Pubmed
,
Xenbase
