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. 1976 Nov 18;264(5583):231-4.
doi: 10.1038/264231a0.

X-ray diffraction studies of circular superhelical DNA at 300-10,000-A resolution

G W Brady, D B Fein

X-ray diffraction studies of circular superhelical DNA at 300-10,000-A resolution

G W Brady et al. Nature. .

Abstract

X-ray diffraction studies on circular superhelical DNA from bacteriophage PM2 at a very low scattering angle show that it is possible to measure the superhelical scattering function of the molecule. The results suggest that in addition to the primary supercoil, a higher order of supercoiling of the DNA is present, an effect which can be interpreted with a simple analogue.

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