The transposon Tn21 and a group of closely related transposons (the Tn21 family) are
involved in the global dissemination of antibiotic resistance determinants in gram-negative …

Integrons are genetic elements that, although unable to move themselves, contain gene
cassettes that can be mobilized to other integrons or to secondary sites in the bacterial …

Antibiotic resistance among avian bacterial isolates is common and is of great concern to the
poultry industry. Approximately 36%(n= 100) of avian, pathogenic Escherichia coli isolates …

The introduction of foreign organic hydrocarbons into the environment in recent years, as in
the widespread use of antibiotics, has resulted in the evolution of novel adaptive …

IntI1 integrase is a member of the prokaryotic DNA integrase superfamily. It is responsible for
mobility of antibiotic resistance cassettes found in integrons. IntI1 protein, as well as IntI1 …

The recent findings of various mobile catabolic genes have provided some insight into the
evolution of microbial degradation systems for xenobiotic compounds. The catabolic genes …

A unique transposon was found in the chromosome of Bacillus megaterium MB1, a Gram-
positive bacterium isolated from mercury-polluted sediments of Minamata Bay, Japan. The …

Multiresistant Escherichia coli isolates of the normal intestinal flora of healthy fattening pigs
were examined for the presence of integron class 1 by XL (extra long) PCR. The class 1 …

Expression of the Tn 21 mercury resistance (mer) operon is controlled by a metal-sensing
repressor-activator, MerR. When present, MerR always binds to the same position on the …

The presence of Class II transposon genes related to Tn 21 and Tn 501, and their structural
arrangements have been determined in a collection of 124 mercury resistant Gram-negative …