Integron-Mediated Rifampin Resistance in Pseudomonas aeruginosa

Abstract
A new rifampin resistance gene, arr-2 , has been found in Pseudomonas aeruginosa . The ARR-2 protein shows 54% amino acid identity to the rifampin ADP-ribosylating transferase encoded by the arr gene from Mycobacterium smegmatis . This arr-2 gene is located on a gene cassette within a class I integron.