jan 5, 1952 - Hershey and Chase To determine whether DNA or proteins are the genetic material Used bacteriophages cultured in radioactively marked sulfur and phosphorus to infect cells, then used centrifugation to separate out the isotopes in the cells The cells contained marked phosphate, but not sulfur, meaning that DNA is the genetic material -
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Date:
jan 5, 1952
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~ 73 years ago