DNA sequencing

DNA sequencing

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Credit: TEK IMAGE/SCIENCE PHOTO LIBRARY

Caption: DNA sequencing. Magnifying glass over the banded DNA sequences or genetic fingerprints of an autoradiogram. The pattern of bands represents the chemical sequence that forms the genetic code for a section of DNA (deoxyribonucleic acid). The DNA sample was cut into fragments by an enzyme and marked with radioactive tags. These fragments were then placed in a gel and separated by electrophoresis, the application of an electric charge. An autoradiogram of the resulting bands of radioactively-tagged DNA was made using radiographic film. DNA sequencing is used in forensic science, medical research and genealogy.

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Keywords: autoradiogram, autoradiograph, bands, bases, biochemistry, biology, biotechnology, code, coloured negative, deoxyribonucleic acid, dna research, dna sequencing, double helix, genetic, genetic fingerprinting, genetics, genome, genomics, lens, magnified, magnifying glass, nucleotides, radiographic film, sequence, still life, still-life

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