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  • 1
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Studies of 521 sera from the Icelandic cousin marriage project were made to assess the incidence of various anti-tissue antibodies and the levels of immunoglobulins, as these were considered to be useful markers of the humoral immune response. Comparisons were made between these parameters and the HLA-A and B antigens, the blood groups, the immunoglobulin allotypes (Gm, Km and Am), the properdin factor (Bf), and other markers.These investigations offered another approach to the study of the sites of action of immune response genes in man. Because the immune response may be expected to differ for each individual and depend at least in part, on the degree of exposure to different antigens, no absolute correlation was expected. There was, however, a marked association between certain IgG anti-tissue antibodies and HLA antigens. This was most marked for HLA-A10, B18 and B27, but not for HLA-A1 or B8.The comparison of immunoglobulin levels with HLA antigens, was less striking, although HLA-A2 appeared to be associated with low levels of IgE. There were also some associations between immunoglobulin levels and ABO blood groups.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Antonie van Leeuwenhoek 78 (2000), S. 315-321 
    ISSN: 1572-9699
    Keywords: actinomycete ; chitinase ; DGGE ; diversity ; DNA ; PCR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sets of PCR primers were designed to amplify bacterial chitinases at different levels of specificity. The bacterial chitinase group primers were successful in targeting enzymes classified within the group A glycosyl hydrolases of family 18. The widespread occurrence of group A bacterial chitinases in actinomycetes was demonstrated. Streptomycete chitinase specific primers were designed and a collection of type strains of species changed in the genes Streptomyces were screened and shown to have at least one and usually multiple chitinase genes. The presence of the gene for the chitin binding protein was also demonstrated within the streptomycete type strains. These data indicate that streptomycetes are well equipped to degrade chitin. The detection of group A chitinases in total community DNA is described and a sandy soil shown to contain more than 10 different genes using DGGE to indicate genetic diversity.
    Type of Medium: Electronic Resource
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