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Embryo Project Encyclopedia
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Johannes Holtfreter (1901-1992)

By: Adam R. Navis | Published: Feb 29, 2008

Johannes Holtfreter made important discoveries about the properties of the organizer discovered by Hans Spemann. Although he spent much time away…

Organizers, EmbryonicBiographyFrogs

Robert William Briggs (1911-1983)

By: Adam R. Navis | Published: Nov 08, 2007

Robert William Briggs was a prolific developmental biologist. However, he is most identified with the first successful cloning of a frog by nuclear…

PeopleNuclear Transfer TechniquesNuclear TransplantationBiography

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