Martha Cowles Chase & Alfred Day Hershey
            

       Blendor Photo: Courtesy of , Sue Lauter, Cold Spring Harbor
       to The Scientist Volume 18 | Issue 7 | 14 | Apr. 12, 2004
  
   Department of Genetics,
   Carnegie Institution of Washington at Cold Spring Harbor
   Long Island, New York.

Martha Chase was Dr. Hershey's lab technician in 1952. They tagged the protein coat of phages with 35S and the DNA core with 32P.  Using a Waring blendor (photo) they caused viruses to break off outside of bacteria with tagged protein going to supernatant and label DNA was lodged inside viral sediment layer confirming that DNA was the genetic information of cells.
                   
                                                           back