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 .
He realized that "an adenine-thymine pair held together by two hydrogen bonds was identical in shape to a guanine-cytosine pair.
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!