Tubes of worm DNA and output from DNA sequencer

Tubes of worm DNA and output from DNA sequencer

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Credit: JAMES KING-HOLMES/SCIENCE PHOTO LIBRARY

Caption: Decoding the genome, or genetic blueprint. Fragments of DNA extracted from the human body (or any other creature) are stored in ethanol contained in the phials visible here. The print- out is from an automatic DNA sequencing machine used to decode the sequence of base-pairs in the DNA fragments. In this method, each of the four bases is labelled with a different fluorescent dye, allowing a laser scanner to differentiate between them. The print-out shows readings of the emitted fluoresence from the dyes. The four bases are colour-coded: cytosine (blue), guanine (black), adenine (green) and thymine (red).

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Keywords: biochemistry, biotechnology, caenorhabditis elegans, computer, dna research, dna sequencing, genetic, genetics, genome project, worm, worm genome project

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