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New insights into the effects of extra nucleolus organizer regions
Human Genetics, 1986Chromosome studies were carried out in four members of a sibship with a 15p+ chromosome. Two carriers had normal offspring, one was unmarried, and the index case had three abortions and no live children. By means of different banding techniques, up to four satellites and four stalks could be observed on the abnormal chromosome.
A, Pérez-Castillo +2 more
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A simple one-step procedure for staining the nucleolus organizer regions
Experientia, 1979A simple silver staining technique for routine use is described by which the nucleolus organizer regions of mammalian chromosomes, including those of mouse chromosomes, are stained selectively.
H Schmiady
exaly +3 more sources
Nucleolus organizer regions in translocations involving acrocentric chromosomes
Cytogenetics and Cell Genetics, 2008Twenty-seven Robertsonian translocations and five translocations involving one acrocentric and one nonacrocentric chromosome were examined with the aid of three staining methods. The chromosomes were identified by Q-banding, and the slides were then destained and restained with a silver impregnation method for nucleolus organizing regions (NORs ...
M, Mikkelsen, A, Basli, H, Poulsen
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The nature of the Ag-staining of nucleolus organizer regions
Cytogenetics and Cell Genetics, 2008Electron micrographs reveal that the Ag-stainable substance is located on the outside of NOR’s or around them but not in the chromosomes themselves. In association figures, the Ag-positive material lies between the acrocentric chromosomes. Light-microscopic studies show that the Ag stainability of the nucleolus in interphase is correlated with the ...
H.G. Schwarzacher +2 more
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Structure and variation of the Nucleolus Organizer Region in turtles
Genetica, 1985Differential staining techniques were used to study the structure and variation of the NORs of 27 species of cryptodiran turtles. No species or individuals had more than a single pair of NORs. Extensive variation in NOR structure and chromosomal location was found among higher taxa and individual variation in NOR size was common.
J. W. Bickham, D. S. Rogers
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Nucleolus organizer regions and heterochromatin in the zebu (Bos indicus L.)
Theoretical and Applied Genetics, 1987Ag-NOR staining and a counterstain enhanced fluorescence technique (chromomycin A3/distamycin A/DAPI-staining = CDD-method) and G-banding, respectively, have been applied to the zebu (Bos indicus L.) chromosomes. The nucleolus organizer regions (NORs) were found in the telomeric regions of chromosomes nos. 2, 3, 4, 11, and 28.
B, Mayr, K, Gruber
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Chromosoma, 1997
A novel nucleolar component has been identified and cloned using a human autoimmune serum. This antigen, as inferred from the cDNA sequence, is an Mr 55000 protein. Immuno blot analysis, however, of both the native protein and the in vitro translation products of the cDNA showed that they migrate on SDS-PAGE at an apparent molecular mass of 90000 A ...
C M, Whitehead +3 more
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A novel nucleolar component has been identified and cloned using a human autoimmune serum. This antigen, as inferred from the cDNA sequence, is an Mr 55000 protein. Immuno blot analysis, however, of both the native protein and the in vitro translation products of the cDNA showed that they migrate on SDS-PAGE at an apparent molecular mass of 90000 A ...
C M, Whitehead +3 more
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Silver staining of nucleolus organizer regions during human spermatogenesis
Human Genetics, 1983The sizes and staining intensities of the nucleolus organizer regions (NORs) in human spermatogenesis were studied qualitatively and quantitatively with the silver (Ag)-staining technique. The Ag-stainability of the NORs is a measure of the transcriptional activity of the ribosomal RNA genes.
M, Schmid +3 more
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Localization of phosphoprotein C23 to nucleolar structures and to the nucleolus organizer regions
Experimental Cell Research, 1981Abstract After extraction of Novikoff hepatoma nucleoli with 4 M urea/3 M LiCl, phosphoprotein C23 was isolated by DEAE-cellulose and Bio-Rad AG3-X4A column chromatography. Immunization of rabbits with the highly purified protein C23 resulted in the production of a specific antibody as determined by Ouchterlony diffusion analysis.
M A, Lischwe +3 more
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[Nucleolus organizer region--centromere translocation].
Annales de genetique, 1989A karyotype 45,XX,-13,-15,+psudic (13;15)(p12.9;11.200) was observed in a young woman after two spontaneous miscarriages. After R-, C-, and NOR - banding - the rearranged element was shown to include: the long arm, the active centromere, and the NOR of chromosome 13, followed by the inactivated centromere, and the long arm of chromosome 15.
M C, de Blois, M O, Rethoré, J, Lejeune
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