Coloured TEM of genetically engineered plasmids

Coloured TEM of genetically engineered plasmids

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This image is part of the feature 50 Years Of Genetics Research
This image is part of the feature Top 50 Science

Credit: DR GOPAL MURTI/SCIENCE PHOTO LIBRARY

Caption: Gene splicing. Coloured transmission electron micrograph of genetically engineered DNA plasmids from the bacteria Escherichia coli. The plasmids (yellow) have had different gene sequences (various colours) spliced into them. Plasmids are symbiotic pieces of DNA (deoxyribonucleic acid) that occur in bacteria and yeast. They are separate from the main chromosome, replicate independently, and can be transferred from one cell to another carrying genes with them. This last property is exploited in genetic engineering. In gene therapy, plasmids with beneficial genes are inserted into human cells using viruses. Magnification: x43,000 at 6x7cm size. x150,000 at 8x10"

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Keywords: biochemistry, biotechnology, dna plasmid, dna research, double helix, e. coli, electron micrograph, escherichia coli, gene splicing, gene therapy, genetic engineering, genetics, plasmid, plasmids, tem, transmission

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