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Abstract:
In their experiments with bacteriophages, Hershey and Chase1 have shown that only the nucleic acid component plays a part in the intracellular multiplication. There are also indications that in simple viruses containing ribonucleic acid the nucleic acid plays a dominant part in the infection. Thus, experiments with tobacco mosaic virus have shown that the protein can be changed chemically without affecting the activity and the genetic properties2; recently, it was even found3 that part of the protein can be removed from tobacco mosaic virus without destroying the activity.
