Plasmid : Definition and properties
What is plasmid?
A plasmid is a small, circular, double strand DNA that replicate independently. They are found in bacteria, and archae. Plasmids can be transferred from one cell to another.
The term plasmid was coined by Joshua Lederberg in 1952.
Ti plasmid is found in Agrobacterium tumefaciens which causes crown gall disease in plants.
Plasmids are important source of horizontal gene transfers.
A large plasmid often called megaplasmid. Large plasmids size is 30 kb to 2.5 Mb.
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