episome

(noun)

A segment of DNA that can exist and replicate either autonomously in the cytoplasm or as part of achromosome, mainly found in bacteria.

Related Terms

  • endogenous

Examples of episome in the following topics:

  • Introduction to Plasmids

    • This image shows a line drawing that compares the activity of non-integrating plasmids, on the top, with episomes, on the bottom, during cell division.
    • The lower half of the image shows a bacterium with its chromosomal DNA, but with an episome.
    • Next to this bacterium, we see the same bacterium, but after the episome has integrated into the chromosomal DNA and has become a part of it.
    • This second bacterium now divides into two bacteria identical to it, each with an episome integrated into it.
  • Other Diseases and Epstein-Barr Virus

    • Instead, the EBV genome circularizes, resides in the cell nucleus as an episome, and is copied by cellular DNA polymerase.
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