From Science Alert:
Earlier this year, scientists identified the existence of a brand new DNA structure never before seen in living cells. That’s right, it’s not just the double helix.
The discovery of what’s described as a ‘twisted knot’ of DNA in living cells confirms our complex genetic code is crafted with more intricate symmetry than just the double helix structure everybody associates with DNA. Importantly, the forms these molecular variants take affect how our biology functions. “In the knot structure, C [cytosine] letters on the same strand of DNA bind to each other – so this is very different from a double helix, where ‘letters’ on opposite strands recognise each other, and where Cs bind to Gs [guanines].”
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