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MacLeod and Avery returned their focus to the problem of bacterial transformation in 1940. After MacLeod left to join the faculty at New York University, Maclyn McCarty joined with Avery to complete the research. This photo appears to be signed by MacLeod.
Original Repository:
The History of Medicine Division. Prints and Photographs Collection
Rights:
Courtesy of The History of Medicine Division. Prints and Photographs Collection.
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Original Repository. History of Medicine Division. Prints and Photographs Collection. 11611. Free Text. This image may also be accessed from the Images from the History of Medicine (IHM).. URL. http://www.nlm.nih.gov/hmd/ihm/. IHM Order Number. B018330