Colour TEM of DNA with enzyme gyrase binding to it

Colour TEM of DNA with enzyme gyrase binding to it

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Credit: PAMELA MCTURK/SCIENCE PHOTO LIBRARY

Caption: Gyrase on DNA. Coloured transmission electron micrograph (TEM) of double-stranded DNA with seven molecules of the enzyme gyrase binding to it. DNA (deoxyribonucleic acid) is a long molecule which codes the genetic information found in all cells. Here, a length of DNA is seen as a wavy line (red). Rounded molecules of gyrase, a type II topoisomerase enzyme, are attached to the DNA. Gyrase forms a complex with DNA and supercoils it. DNA needs to be supercoiled in the cell and is wrapped around the enzyme. Gyrase is not only important for this coiling process, but helps with DNA replication and is found at DNA replication forks. Magnification: unknown.

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Keywords: biochemical, biochemistry, dna, dna gyrase, dna replication, double helix, electron micrograph, enzyme, enzyme gyras, enzyme gyrase, genetic, genetics, gyrase, gyrase enzym, gyrase enzyme, on dna, replication, supercoiled, supercoiled dna, tem, transmission

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