Mobile genetic elements (MGE) are a type of DNA that can move around within the genome.They include: 1  Transposons (also called transposable elements). 2  Retrotransposons. 3  DNA transposons. 4  Insertion sequences. 5  Plasmids. 6  Bacteriophage elements, like Mu, which integrates randomly into the genome.7  Group II introns.obile genetic elements play a critical role in the spread of virulence factors, such as exotoxins and exoenzymes, amongst bacteria. Strategies to combat certain bacterial infections by targeting these specific virulence factors and mobile genetic elements have been proposed.