Location of nucleolar organizers in animal and plant chromosomes by means of an improved N-banding technique

With an improved N-banding technique, the location of nucleolar organizing region was determined in 27 kinds of material including mammals, a marsupial, birds, amphibians, fishes, an insect and plants. In most cases the N-bands were clearly located on certain specific regions of chromosomes, such as...

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Bibliographic Details
Published in:Chromosoma 1975-01, Vol.49 (4), p.357-370
Main Authors: Funaki, K, Matsui, S, Sasaki, M
Format: Article
Language:English
Subjects:
Amphibians
Animals
Birds
Cell Nucleolus
Chromosomes - ultrastructure
Drosophila melanogaster
Fishes
Heterochromatin - analysis
Humans
Mitosis
Nucleoproteins - analysis
Plants
RNA, Ribosomal
Staining and Labeling
Trichloroacetic Acid
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Summary:With an improved N-banding technique, the location of nucleolar organizing region was determined in 27 kinds of material including mammals, a marsupial, birds, amphibians, fishes, an insect and plants. In most cases the N-bands were clearly located on certain specific regions of chromosomes, such as the secondary constriction, satellite, centromere, telomere and heterochromatic segment, while in some species they were detected as very minute bodies distributed over many chromosomes. From the available cytological and biochemical data it was suggested that the N-bands represent certain structural non-histone proteins specifically linked to nucleolar organizers in various eukaryotic chromosomes.
ISSN:0009-5915
1432-0886
DOI:10.1007/bf00285128