PMID: 1201683Nov 20, 1975Paper

The mitotic chromosomes of Notophthalmus (=Triturus) viridescens: localization of C banding regions and DNA sequences complementary to 18S, 28S and 5S ribosomal RNA

Chromosoma
N Hutchison, M L Pardue

Abstract

The metaphase chromosomes of Notophthalmus (Triturus) viridescens have been studied by C-banding and in situ hybridization. The chromosomes show the pericentric C-banding seen in many organisms and in addition have interstitial C-bands located a short distance from the pericentric C-bands on each chromosome arm. A few C-bands are seen in telomeric regions. Regions which hybridize in situ with 18S and 28S ribosomal RNA were found on three chromosome pairs. The animals studied fell into three groups with respect to which of the six possible sites showed detectable hybridization with 18S and 28S RNA. Individual animals differed not only in the pattern of in situ hybridization of ribosomal RNA but also in the number of ribosomal RNA cistrons in the genome as measured by saturation hybridization on purified DNA. In situ hybridization showed five pairs of chromosomes which contained DNA complementary to 5S RNA. The four pairs of subtelocentric chromosomes in the N. viridescens karyotype all have 5S DNA in the pericentric regions. The fifth cluster of 5S DNA is in the middle of one arm of the chromosomes in one of the two smallest submetacentric pairs in the genome. The five sites of 5S DNA differ markedly in the level of in situ hybr...Continue Reading

References

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Citations

Jan 1, 1981·Chromosoma·L D SchultzJ G Gall
Nov 20, 1975·Chromosoma·T C HsuM L Pardue
Jul 1, 1994·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·A M Tan
May 8, 2008·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·John F Marko
Dec 11, 1981·Nucleic Acids Research·B K Kay, J G Gall
May 18, 2007·Annual Review of Cell and Developmental Biology·Mary-Lou Pardue
Jan 27, 1975·Annals of the New York Academy of Sciences·G G Slattery, A J Schmidt
Oct 1, 1988·Molecular & General Genetics : MGG·T H EllisK W Burcham
Mar 22, 1982·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·H G Callan
Apr 1, 1979·The Australian and New Zealand Journal of Surgery·D PanettaA Pitt
Jul 3, 2021·Animals : an Open Access Journal From MDPI·Marcello MezzasalmaFabio Maria Guarino

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