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A pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule.
‘During translocation the elongation complex moves along the DNA double helix carrying an RNA chain of increasing length.’
‘The links between pairs of bases are responsible for binding together two strands to form the characteristic double helix of a DNA molecule.’
‘In order to see the primary structure, the double helix of DNA is unzipped and the pattern of nucleotides is revealed.’
‘Topoisomerases are able to relieve torsional stress in DNA double helices and separate intertwined DNA molecules.’
‘What do an oily rain puddle in the parking lot, a compact disc, and the discovery of the DNA double helix have in common?’
‘Genetics and crime fighting are becoming as intertwined as the DNA double helix.’
‘This molecule, however, can exist in two enantiomeric forms depending on how the molecule enters the DNA double helix.’
‘As the replication forks progress along the template strands the newly synthesized daughter strands and parental template strands reform a DNA double helix.’
‘Clearly, the rigidity is different for the regions consisting of one double helix or two double helices and the bends are likely to be localized at certain points within the unit.’
‘As the force is increased, the structural parameters of the DNA double helix are revealed, including the free energy of the basepair interaction.’
‘The structural distortions at the site of damage are translated across the DNA double helix to the active site of human topoisomerase I.’
‘Further spermidine penetration between the double helices causes DNA resolubilization.’
‘The DNA double helix, the first structure of a biological molecule, was determined by X-ray crystallography in 1953.’
‘In an actin filament, two chains of actin beads wrap around each other in yet another double helix.’
‘Water is essential for the stability and function of ‘the aperiodic crystal of heredity’ the DNA double helix.’
‘This ensures that no basepair in the DNA double helix, regardless of its sequence context, acquires a very high thermodynamic propensity for opening.’
‘This comes from the structure of the sugar molecules used in the DNA double helix.’
‘Similar hydrogen bonds from the adenine amino groups are also involved in the binding of proteins into the major groove of DNA double helices.’
‘The opening of basepairs in DNA double helices is a prerequisite for propagation and expression of genetic information.’
‘The DNA structure is a double helix looking something like a twisted ladder.’