Morphology of deoxyribonucleic acid extracted from cores of vaccinia virus.


It has become apparent during the past few years that viral genomes may exist, at some stage of their life cycle, as an endless structure that can for convenience be termed a circle. The deoxyribonucleic acid (DNA) of small viruses such as polyoma appears to exist in this form inside the virion, since it can be extracted as rings a few microns in length (R… (More)


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