R1 plasmid


The R1 Plasmid is a plasmid that was first isolated from Salmonella paratyphi bacteria in 1963.
The R1 plasmid imparts multi-drug antibiotic resistance to its host bacteria.
It's known as a "low copy" plasmid, meaning that it exists in relatively few copies in any given bacteria. Because of its low copy nature, R1 must rely on "type II" segregation system to ensure that at least one copy is contained in each daughter cell after cell division.
Some genes on the R1 plasmid are: