Tn 1403 , a Multiple-Antibiotic Resistance Transposon Made Up of Three Distinct Transposons

Abstract
Transposon Tn 1403 from a clinical Pseudomonas strain is composed of three transposons, including Tn 5393c . A related transposon Tn 1404 * from a plant-associated Pseudomonas strain lacks Tn 5393 but includes a transposon carrying the tet (C) tetracycline resistance determinant. These compound transposons illustrate the role of preexisting transposons in generating clusters of antibiotic resistance genes.