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Maclyn McCarty was an American geneticist.
Maclyn McCarty, who devoted his life as a physician-scientist to studying infectious disease organisms, was best known for his part in the monumental discovery that DNA, rather than protein, constituted the chemical nature of a gene. Uncovering the molecular secret of the gene in question — that for the capsular polysaccharide of pneumococcal bacteria — led the way to studying heredity not only through genetics but also through chemistry, and initiated the dawn of the age of molecular biology. McCarty was the youngest and longest surviving member of the research team responsible for this feat, which also included Oswald T. Avery and Colin MacLeod; he died on January 2, 2005, from congestive heart failure.
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