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Sample tubes of oligonucleotides for DNA research
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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