extrachromosomal DNA

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ex·tra·chro·mo·som·al DNA

DNA that occurs naturally outside of the nucleus (for example, mitochondrial DNA).

extrachromosomal DNA

DNA which is independent of the host's chromosomal DNA. See for example PLASMID.
References in periodicals archive ?
For this analysis, we used an approach that had previously been used successfully for the characterization of rare linear extrachromosomal DNA species (21).
Using an approach that had previously been used to examine rare linear extrachromosomal DNA species (21), in which DNA size-fractionated by gel electrophoresis was subsequently extracted and analyzed by PCR, we made the surprising finding that a large discrepancy existed in the size of circulatory fetal and maternal DNA species.
So we're delivering extrachromosomal DNA that has all the 'start' and 'stop' signatures and other information the cell needs to make the appropriate protein, in this case, the missing enzyme.
Extrachromosomal DNA isolation and agarose electrophoresis.
In human cells, mitochondria are the only organelles that contain extrachromosomal DNA.
A bacterial genome if flux; the twelve linear and nine circular extrachromosomal DNAs in an infectious isolate of the Lyme disease spirochete Borrelia burgdorferi.

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