RK2 plasmid

The RK2 Plasmid is a broad-host-range plasmid belonging to the incP incompatibility group It is notable for its ability to replicate in a wide variety of single-celled organisms, which makes it suitable as a genetic engineering tool. It is capable of transfer, replication, and maintenance in most genera of Gram-negative bacteria. RK2 may sometimes be referred to as pRK2, which is also the name of another, unrelated plasmid. Other names for RK2 include R18, R68, RP1, and RP4. These were all separate isolates, and later found to be identical plasmids. The IncP-1 plasmid group (IncP plasmids in Escherichia coli) of which RK2 is a part has been described as "highly potent, self-transmissible, selfish DNA molecules with a complicated regulatory circuit"

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