Reports

Electron Microscopy of Single-Stranded DNA: Circularity of DNA of Bacteriophage ϕX174

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Science  09 Oct 1964:
Vol. 146, Issue 3641, pp. 254-255
DOI: 10.1126/science.146.3641.254

Abstract

The single-stranded DNA of coliphage ϕX174 has been examined with the electron microscope by a modification of the protein-monolayer-adsorption technique. The molecules were found to be circular with a total length of 1.77 ± 0.13 microns.