Complementary base pairing, Erwin Chargaff
Interviewee: Erwin Chargaff. Erwin Chargaff talks about his name for Chargaff's ratios. (DNAi Location: Code > Finding the structure > Players > Erwin Chargaff > What Chargaff called the ratios)
Well you see the special thing is, there were the stupid name of the Chargaff Rules, I have never called them Chargaff Rules, but anyway that is the base pairing, I called it a complementary situation, I don't think I gave the name base pairing, I think that is one of the few things that Watson really did.
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Erwin Chargaff found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are equal. This parity is obvious in the final DNA structure.
Erwin Chargaff talks about his discovery â a major step for building the DNA model.
James Watson talks about how he worked out the base pairing of DNA.
Erwin Chargaff reads a passage from his book Heraclitean Fire: Sketches from a Life Before Nature, describing his impressions of Crick and Watson.
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.
Be James Watson; match the base pairs in this interactive game.
15492. Discovering the double helix structure of DNA, James Watson, video with 3D animation and narration
James Watson used cardboard cutouts representing the shapes of the DNA bases to figure out how bases pair.
James Watson talks about the Human Genome Project and government funding.
DNA base pairs
Animation of 2D DNA model becoming three dimensional.