Abstract
We have constructed a set of novel Mycobacterium-Escherichia coli shuttle vectors using either a kanamycin- or hygromycin-resistance gene and the replication region from a Corynebacterium plasmid. Important features of these new vectors (pEP2 and pEP3) are that they are small, contain multiple cloning sites, and replicate to high copy number in various Mycobacterium species and E. coli. These vectors are unusual in that plasmid replication in gram-negative and gram-positive bacteria appears to be controlled from a single region. These plasmids will be useful for the genetic analysis of Mycobacterium and gene expression in this genus, particularly Mycobacterium bovis BCG.
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