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  • Electronic Resource  (2)
  • HLA-DQA  (1)
  • Nucleotide sequence of R.-M. genes  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 216 (1989), S. 380-387 
    ISSN: 1617-4623
    Keywords: Restriction-modification system ; Neisseria gonorrhoeae ; Nucleotide sequence of R.-M. genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The NgoPII restriction endonuclease, which recognizes the sequence 5′-GG↓CC-3′, differs from its isoschizomer HaeIII in being sensitive to methylation at the external cytosine residue. The entire nucleotide sequence of a cloned 3.3 kb segment of Neisseria gonorrhoeae strain P9 chromosomal DNA which harbours the NgoPII restriction-modification system has been determined. This data, coupled with sub-cloning experiments, indicates that the restriction endonuclease (R.NgoII) and modification (M.NgoII) genes are transcribed from separate promoters but are arranged in tandem, with the R.NgoPII gene being located on the 5′ side of the M.NgoPII gene. Unlike all previously reported restriction systems the 3′ end of the endonuclease open reading frame overlaps the 5′ end of the methylase open reading frame by 8 codons. This overlap may have implications for the regulation of the NgoPII restriction-modification system.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1437-1596
    Keywords: Sex-test ; Amelogenin ; PCR ; HLA-DQA1 ; Sex-Test ; Amelogenin ; PCR ; HLA-DQA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Durch Amplifikation eines Segments des X-Y-homologen Gens Amelogenin wurde eine Geschlechtsidentifikation forensischer Proben durchgeführt. Mit einem einzigen Primerpaar, welches einen Teil des ersten Introns überspannt, wurden PCR-Produkte mit 106bp und 112bp von den homologen Anteilen des X- und des Y-Chromosoms generiert, welche dann mit Hilfe der Agarosegelelektrophorese aufgetrennt wurden. Dieser Test erlaubte es, daß so geringe Mengen wie 20pg DNA von stärkergradig degradierten Knochen amplifiziert und ineiner Einzelreaktion typisiert wurden. Durch Benutzung von farbstoffmarkierten Primern war es ferner möglich, durch automatisierte Fluoreszenzdetektion die relative Ausbeute von X- und Yspezifischen PCR-Produkten zu quantifizieren, wie sie von Mischungen männlicher und weiblicher DNA generiert wurden. Die Vielseitigkeit dieses Sex-Tests wurde ferner dadurch nachgewiesen, daß eine Co-Amplifikation mit dem HLA-DQA1 „Amplitype”-Kit in einem kombinierten Geschlechtsbestimmungs-und Identifizierungs-DNA-Test möglich war.
    Notes: Summary Gender identification of forensic samples was determined by amplifying a segment of the X-Y homologous gene amelogenin. Using a single pair of primers spanning part of the first intron, 106 by and 112 by PCR products were generated from the X and Y homologues respectively, which were then resolved by agarose gel electrophoresis. This test enabled as little as 20 pg of DNA from severely degraded bones to be amplified and typed in a single tube reaction. Furthermore, using dye-labelled primers, it was possible to quantitate, by automated fluorescence detection, the relative yields of X and Y -specific PCR products generated from mixtures of male and female DNA. The versatility of this sex test was further demonstrated by co-amplifying with the HLA-DQA1 Amplitype kit in a combined gender/identity DNA test.
    Type of Medium: Electronic Resource
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