guanine :

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guanine

g woneen

  • n  a purine base found in DNA and RNA; pairs with cytosine

  • He realized that "an adenine-thymine pair held together by two hydrogen bonds was identical in shape to a guanine-cytosine pair.
  • Normally, humans have five to 55 repetitions of the nucleotides CGG (cytosine, guanine, guanine) in this region.
  • Working with only the four basic nucleotides that make up all DNA adenine, cytosine, guanine and thymine he has assembled an entirely new chromosome for an entirely new one .
News & Articles

  • Researchers extend human epigenomic map
    New research describes the dynamics of DNA methylation across a wide range of human cell types. Chemically, these marks are the addition of a methyl group -- one carbon atom surrounded by three hydrogen atoms -- anywhere a cytosine nucleotide sits next to a guanine nucleotide in the DNA sequence.
    Aug. 8, 2013 - Science Daily
  • HSCI researchers extend human epigenomic map
    ( Harvard University ) New research by the Harvard Stem Cell Institute's Alex Meissner, published online as a letter in the journal Nature, describes the dynamics of DNA methylation across a wide range of human cell types. Chemically, these marks are the addition of a methyl group -- one carbon atom surrounded by three hydrogen atoms -- anywhere a cytosine nucleotide sits next to a guanine ...
    Aug. 8, 2013 - EurekAlert!

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