A chemically inducible acetamidase promoter-sigF fusion gene was integrated into the chromosome of Mycobacterium bovis BCG. Two-dimensional protein gel analysis permitted the identification of a number of protein spots whose expression was SigF related. One spot upregulated by inappropriate induction of sigF expression corresponded to the 16-kDa antigen alpha-crystallin.
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Manabe et al. (1999) studied this question.
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