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  • 1995-1999
  • 1975-1979  (2)
  • 1960-1964
  • 1976  (2)
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Material
Years
  • 1995-1999
  • 1975-1979  (2)
  • 1960-1964
Year
  • 1
    Electronic Resource
    Electronic Resource
    α-(4'-Iodo-1'-diazocyclohexane)-β-naphthol (1976)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 2230-2231 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740876007449
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Interchromosomal asynchrony of DNA replication in polytene chromosomes of Drosophila pseudoobscura (1976)
    Springer
    Chromosoma 54 (1976), S. 117-125 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Analysis of 3H-thymidine autoradiograms of late third instar larval salivary glands of Drosophila pseudoobscura revealed a unique example of asynchrony of replication in the autosome complement. The two autosomal arms, 2 and 3, show similar labeling pattern during the initial phases, DD to 3C, and thereafter, the chromosome 3 has fewer labeled sites than chromosome 2 until the most terminal pattern, 1D. Detailed sitewise analysis of 3H-thymidine labeling shows that while nearly 54% of the sites examined in chromosome 2 have a labeling frequency greater than 50%, only 13% of all sites in chromosome 3 have labeling frequency at that range. The number of labeled sites on chromosome 3 plotted against that on chromosome 2 shows a hyperbolic profile rather than a linear relationship. The silver grain ratio of the 2nd to 3rd increases from 1.5 to 3.1 through different stages of the cycle. These results suggest that both chromosomes start replication simultaneously but the third chromosome appears to complete the replication earlier than the second. These data open up the possibility of separate control mechanisms for the initiation and termination of DNA replication in polytene chromosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00292834
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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