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Genomic structure of the RTX element in the V. cholerae N16961 chromosome. (Upper) Schematic representation of the RTX element and its physical relationship to the nearby CTX and TLC elements in the V. cholerae El Tor N16961 genome. (Lower) Lineup of this RTX gene cluster with the RTX elements from three other Gram-negative organisms. The known or predicted functions of the ORFs within the gene clusters are indicated by different shadings.
