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  • Title: Antigenic characterization of Mycobacterium bovis BCG soluble antigens.
    Author: Gupta VK, Ram GC, Bansal MP.
    Journal: Vet Microbiol; 1994 Jan; 38(3):227-40. PubMed ID: 8017027.
    Abstract:
    The proteins in Mycobacterium bovis BCG sonicated antigens were separated by gel filtration chromatography. A total of 6 regions were observed. All the regions were analyzed separately for their antigenic reactivity using enzyme linked-immunosorbent assay (ELISA), delayed type hypersensitivity (DTH) skin testing and an in vitro lymphocyte transformation test (LTT). Region I of high molecular weight was found to have more reactivity in comparison to regions of lower molecular weight. When region I was subjected to anion exchange chromatography, it resolved into 5 further regions. Of these regions only region III was found to have highest reactivity when tested in ELISA, DTH and LTT. This was interpreted to indicate that region III of anion exchange chromatography has immunodominant epitopes. On sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis, this region was found to be a homogeneous polypeptide of 71 kDA molecular weight. All regions were found to crossreact with various mycobacteria used in this study.
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