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tetracycline resistance efflux system leader peptide Stalling of the ribosomal translation of a tetracycline resistance system mRNA from inability to properly translate a short leader peptide can affect mRNA secondary structure, preventing early transcriptional termination and therefore inducing expression of the resistance protein. This leader peptide is found upstream of efflux transporters such as tet(L) and tet(45) (which occur in Gram-positive organisms), but on occasion may occur as a fused additional N-terminal domain of such efflux proteins.
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