https://en.wikipedia.org/wiki/Alec_Todd
QT:{{”
By 1951, Todd and collaborators at Cambridge had determined by biochemical methods how the backbone of DNA is structured via the successive linking of carbon atoms 3 and 5 of the sugar to phosphates. This helped corroborate Francis Crick and James_Watson’s X-ray structural work published in 1953.[11][12]: 94 [13]: 7–8
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