Oligonucleotides. Sample tubes containing oligo- nucleotides used in DNA research. Here, the oligonucleotides are used to create \antisense\" molecule

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Oligonucleotides. Sample tubes containing oligo- nucleotides used in DNA research. Here, the oligonucleotides are used to create \antisense\" molecules. Oligonucleotides are chains of nucleo- tides: purines and pyrimidines, which are the bases which form the genetic code of DNA. Oligo- nucleotides can be used to make \"antisense\" mole- cules, molecules which are genetically engineered to bind to a gene on the DNA. \"Antisense\" can be used in gene thereapy to block a gene and prevent it from expressing itself. Oligonucleotides may also be used in PCR (Polymerase Chain Reaction) research to clone fragments of DNA."

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Photo credit: © PHILIPPE PLAILLY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: antisense, biochemistry, biotechnology, dna, engineering, genetic, genetics, oligonucleotide, oligonucleotides, pcr, recombinant, research, sample