DNA synthesis in rye chromosomes
نویسندگان
چکیده
منابع مشابه
Transcriptionally active heterochromatin in rye B chromosomes.
B chromosomes (Bs) are dispensable components of the genomes of numerous species. Thus far, there is a lack of evidence for any transcripts of Bs in plants, with the exception of some rDNA sequences. Here, we show that the Giemsa banding-positive heterochromatic subterminal domain of rye (Secale cereale) Bs undergoes decondensation during interphase. Contrary to the heterochromatic regions of A...
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In tetraploid rye with single-substitution wheat chromosomes - 1A, 2A, 5A, 6A, 7A, 3B, 5B, 7B - chromosome pairing was analysed at metaphase I in PMCs with the C-banding method. The frequency of univalents of chromosome 1A was considerably higher than that of the other four wheat chromosomes of genome A (6A, 5A, 7A and 2A). Among chromosomes of genome B, the lowest mean frequency of univalents ...
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Repetitive DNA sequences in the terminal heterochromatin of rye (Secale cereale) chromosomes have consequences for the structural and functional organization of chromosomes. The large-scale genomic organization of these regions was studied using the telomeric repeat from Arabidopsis and clones of three nonhomologous, tandemly repeated, subtelomeric DNA families with complex but contrasting high...
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It has been previously demonstrated (1) that the length of the period of DNA synthesis (S period) as measured by uptake of tritiated thymidine is approximately the same in several animal cells. Since the length of this period (with a range of 6/~ to 8 hours) appears to be independent of the species of the cell, the chromosome number, the cells of human diploid strains in long term cultivation.
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We have partially purified replicating simian virus 40 (SV40) chromosomes in a form which allows continued DNA synthesis in vitro. We first prepare a soluble DNA-synthesizing system from SV40-infected monkey cells and then sediment the components through a neutral sucrose gradient of extremely low ionic strength. Replicating SV40 chromosomes isolated from such gradients are capable of continuin...
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ژورنال
عنوان ژورنال: Heredity
سال: 1973
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1973.25