(redirected from Multicopy plasmid)
Also found in: Thesaurus, Medical, Encyclopedia.


A circular, double-stranded unit of DNA that replicates within a cell independently of the chromosomal DNA. Plasmids are most often found in bacteria and are used in recombinant DNA research to transfer genes between cells.


(Genetics) a small circle of bacterial DNA that is independent of the main bacterial chromosome. Plasmids often contain genes for drug resistances and can be transmitted between bacteria of the same and different species: used in genetic engineering
[C20: from plasm + -id1]


(ˈplæz mɪd)

a strand or loop of DNA that exists independently of the chromosome in bacteria and yeast and that is capable of genetic replication: used in recombinant DNA procedures as a vehicle of gene transfer.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.plasmid - a small cellular inclusion consisting of a ring of DNA that is not in a chromosome but is capable of autonomous replication
cellular inclusion, inclusion body, inclusion - any small intracellular body found within another (characteristic of certain diseases); "an inclusion in the cytoplasm of the cell"
References in periodicals archive ?
Khorana, "Expression of the bacterioopsin gene in Halobacterium halobium using a multicopy plasmid," Proceedings of the National Academy of Sciences of the United States of America, vol.
However, the presence in certain enterobacteria of the gene for a penicillinase on a small multicopy plasmid, which results in production of large amounts of the enzyme and confers resistance to [beta]-lactamase inhibitors by trapping (24).
A multicopy plasmid of the extremely thermophilic archaeon Sulfolobus effects its transfer to recipients by mating.

Full browser ?