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Heinz Ludwig Fraenkel-Conrat was a biochemist, famous for his viral research.
Fraenkel-Conrat was born in Breslau/Germany and received an MD from the University of Breslau in 1933. Due to the rise of Nazism in Germany he left for Scotland in 1933 and finished his PhD at the University of Edinburgh. After completing his doctorate, he emigrated to the United States, becoming a naturalized citizen in 1941. In the 1940s Fraenkel-Conrat visited his sister and brother-in-law, biochemist Karl Slotta, a pioneer in the study of progesterone, estriol, and medical use of venom, who was then director of the Chemical Institute of the Instituto Butantan in São Paulo, Brazil from 1935 to 1948. Frankel-Conrat remained for one year of biochemical research at the Instituto Butantan. He worked at a number of institutes before joining the faculty at the University of California, Berkeley in 1952 where he remained until his death.
His most noted research was on the tobacco mosaic virus and the holmes ribgrass virus. He discovered that the genetic control of viral reproduction was RNA and that it is carried in the nucleic core of each virus. In 1955 he and biophysicist Robley Williams showed that a functional virus could be created out of purified RNA and a protein coat. In 1960 he announced the complete sequencing of the 158 amino acids in the virus.
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