July 29th
Born on 29 July 1910; He died on April 10, 1999 at the age of 88.
German-American biochemist who first identified that the reproduction of a virus is controlled by genetic information in the ribonucleic acid nucleus. His pioneering work was on the tobacco mosaic virus, which he first split into a hollow protein shell and ribonucleic acid inside. He found the protein to be inert, but definitively proved that the RNA genetic material was the infectious agent.
