James Watson and Francis Crick explain how they solved the structure of DNA. Erwin Chargaff explain how he measured the levels of each of the four nitrogenous bases.
Keywords:oai:nsdl.org:2200/20110722012542152T,NSDL,NSDL_SetSpec_BEN,francis crick,adenine,guanine,phosphate group,dna molecule,james watson,structure of dna,Life Science,deoxyribose sugar,History/Policy/Law,cytosine
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