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'Quadruple helix' DNA seen in human cells
Key Excerpts from Article on Website of BBC News


BBC News, January 20, 2013
Posted: January 29th, 2013
http://www.bbc.co.uk/news/science-environment-21091066

Cambridge University scientists say they have seen four-stranded DNA at work in human cells for the first time. The famous "molecule of life", which carries our genetic code, is more familiar to us as a double helix. But researchers tell the journal Nature Chemistry that the "quadruple helix" is also present in our cells, and in ways that might possibly relate to cancer. They suggest that control of the structures could provide novel ways to fight the disease. "The existence of these structures may be loaded when the cell has a certain genotype or a certain dysfunctional state," said Prof Shankar Balasubramanian from Cambridge's department of chemistry. Balasubramanian's group has been pursuing a four-stranded version of the molecule that scientists have produced in the test tube now for a number of years. The new research is said to be the first to firmly pinpoint the quadruple helix in human cells.

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