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In this study, the expression of the Mycobacterium tuberculosis PE, PE_polimorphic GC-rich sequences (PGRS) gene family encoding approximately 99 glycine-rich proteins was assayed by reverse-transcriptase polymerase chain reaction (RT-PCR) in M. tuberculosis H37Rv, Mycobacterium canettii and two clinical isolates of M. tuberculosis. Restriction analyses and sequencing of the RT-PCR products showed...
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