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"The DNA Story." 1973.
Created by VSM Productions. Produced by Ronald Fouracre and Peter Shaw. Distributed by John Wiley & Sons, London, New York.
Discovering the Base Pairs. (1:04)
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James Watson: At that stage, they still hadn't completed the metal models of the bases that we wanted, so I had cut out some paper models
of the bases - not very accurate, but enough so I could put hydrogen atoms on different places to see where you might form
hydrogen bonds. Francis said that I should definitely think about Chargaff's rules, that adenine equals thymine and that guanine
The next morning - I don't know why I didn't do it right away - it was a beautiful spring, and the next morning I started
playing with models, and I discovered that you could put adenine and thymine together in the exact same way that you could
put guanine and cytosine together. That was sort of the base pairs. I was immensely excited. Francis came in and got a point
that I hadn't gotten at all; that you could flip the pair so that adenine could be on either side of the thymine pair.
ClipCreator: James D. Watson
Associated: Francis Crick, Erwin Chargaff
Clip ID: 1973v.3-models
Full WorkCreator: VSM Productions, Ronald Fouracre, Peter Shaw
Associated: Linus Pauling, Francis Crick, James D. Watson, Maurice Wilkins
Copyright: More Information