Electron Microscopy of the Replicative Form of the DNA of the Bacteriophage øX174

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Science  15 Nov 1963:
Vol. 142, Issue 3594, pp. 961
DOI: 10.1126/science.142.3594.961


Electron micrographs of surface films containing the replicative form of the DNA of bacteriophage, øX174 show ring structures, whose average contour length is 1.64 µ, which have the characteristic appearance of double-stranded DNA throughout most of their length.