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The DNA double helix structure proposed by Watson and Crick was based upon "Watson-Crick" bonds between the four bases most frequently found in DNA (A, C, T, G) and RNA (A, C, U, G). However, later research showed that triple-stranded, quadruple-stranded and other more complex DNA molecular structures required Hoogsteen base pairing.
This is an accepted version of this page This is the latest accepted revision, reviewed on 26 January 2025. British X-ray crystallographer (1920–1958) This article is about the chemist. For the Mars rover named after her, see Rosalind Franklin (rover). Rosalind Franklin Franklin with a microscope in 1955 Born Rosalind Elsie Franklin (1920-07-25) 25 July 1920 Notting Hill, London, England ...
Franklin was a physical chemist who made pivotal research in the discovery of the structure of DNA, known as "the most important discovery" in biology. [1] [2] DNA itself had become "life's most famous molecule". [3] While working at the King's College London in 1951, she discovered two types of DNA called A-DNA and B-DNA. Her X-ray images of ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. American molecular biologist, geneticist, and zoologist (born 1928) For other people named James Watson, see James Watson (disambiguation). James Watson Watson in 2012 Born James Dewey Watson (1928-04-06) April 6, 1928 (age 96) Chicago, Illinois, U.S. Education University of Chicago (BS ...
The double-helix model of DNA structure was first published in the journal Nature by James Watson and Francis Crick in 1953, [6] (X,Y,Z coordinates in 1954 [7]) based on the work of Rosalind Franklin and her student Raymond Gosling, who took the crucial X-ray diffraction image of DNA labeled as "Photo 51", [8] [9] and Maurice Wilkins, Alexander Stokes, and Herbert Wilson, [10] and base-pairing ...
Now, scientists have used ancient DNA collected from the casts that have been made to better understand the Pompeii residents and their origins. What they found alters history that’s been ...
DNA from human remains found in a medieval well suggests they belonged to Ashkenazi Jews who fell victim to antisemitic violence during the 12th century. ... Scientists from the Natural History ...
Johannes Friedrich Miescher (13 August 1844 – 26 August 1895) is a Swiss physician and biologist. He was the first scientist to isolate nucleic acid in 1869. Miescher also identified protamine and made several other discoveries.