DNA sequence

DNA sequence

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Credit: TEK IMAGE/SCIENCE PHOTO LIBRARY

Caption: DNA autoradiographs. Banded DNA sequences or genetic "fingerprints" overlapping on a computer screen. The bands represent the sequence of bases that form the genetic code in DNA (deoxyribonucleic acid) molecules. To make an autoradiograph a DNA sample is cut into fragments by an enzyme and marked with radioactive tags. The fragments are then placed in a gel and separated by electrophoresis, the application of an electric charge. Placing a radiographic film on the gel produces a radiograph of the resulting DNA bands, which can be analysed and compared for similarity to other DNA samples.

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Keywords: analysis, autoradiographs, banded, bands, biochemistry, biotechnology, computer screen, deoxyribonucleic acid, dna research, dna sequencing, double helix, fingerprints, genetic, genetics, macintosh, processed, processing, research, sequences, still life, still-life

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