character: Francis Crick
topic: Understanding DNA Structure
grade: 6
subject: History
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character: James Watson
topic: Discovery of the DNA Double Helix
grade: 6
subject: History
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character: Rosalind Franklin
topic: X-ray Diffraction and DNA
grade: 6
subject: History
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character: Linus Pauling
topic: Protein Structure and Molecular Biology
grade: 6
subject: History
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