 Rosalind Franklin was asked to set up a DNA laboratory using X-ray technology.  Rosalind Franklin was best well known for her X-ray diffraction images.

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Presentation transcript:

 Rosalind Franklin was asked to set up a DNA laboratory using X-ray technology.  Rosalind Franklin was best well known for her X-ray diffraction images of DNA.  Her images led into the discovery of the double helix of DNA.

Steps She UsedSteps She Used  She first purified large amounts of DNA  Then she stretched DNA fibers in a thin glass so that all the strands were parallel  Then she aimed a high power x-ray beam at the concentrated DNA  Finally she recorded the pattern on film.

 She used X-Ray crystallography to study the DNA structure.  X-ray crystallography is when atoms are mapped by looking at the image of the crystal under an X-ray beam.

 She had the responsibility of finding the structure of DNA.  She found A and B forms of DNA  She focused more an A because it showed more X-ray spots.

 Her findings were confirmed by James Watson and Francis Crick.  James Watson was showed an image of Franklins work.  This allowed Watson and Francis Crick to build a molecule the explained the specific properties and structure of DNA.

 After their discovery, James Watson, Francis Crick, and Maurice Wilkins were awarded a Nobel Prize in physiology.  Franklin could not be honored because of her death in 1958 caused by ovarian cancer.

Crystallography PhotosCrystallography Photos

Websites UsedWebsites Used  history/themes/biomolecules/dna/watson-crick-wilkins-franklin.aspx history/themes/biomolecules/dna/watson-crick-wilkins-franklin.aspx  rosalind-fran/ rosalind-fran/  