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Tuberculosis (TB) is still one of the greatest health care problems in the world. In order to identify antigens that may be used in the serodiagnosis of active tuberculosis, a short fragment from Rv3391 (fRv3391) of Mycobacterium tuberculosis was cloned and expressed. Its molecular weight and secondary structure elements were identified by mass spectrometry and circular dichroism. And its immunological...
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