Characterization of the secreted antigens of Mycobacterium bovis BCG: comparison of the 46-kilodalton dimeric protein with proteins MPB64 and MPB70. |
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| Authors: | C Abou-Zeid M Harboe G A Rook |
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| Affiliation: | Department of Microbiology, School of Pathology, Middlesex Hospital Medical School, London, United Kingdom. |
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| Abstract: | Western blot analysis showed that the 46-kilodalton (kDa) dimeric protein antigen secreted in large amounts by some daughter strains of Mycobacterium bovis BCG corresponded to protein MPB70 present in long-term culture filtrates of the Japanese substrain. The 46/23-kDa antigen is the most abundant protein in supernatant from a 5-day culture but is masked by leaked products in old culture supernatants. No similarities were found between the 46-kDa protein and MPB64, a protein with the same strain distribution, or with the antigen of similar molecular mass recognized by monoclonal antibody SA1.D2D. |
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