RNA Timeline: A History in Hybridization and Structure Alexander Rich and David Davies discover the double-stranded RNA helix and show that polyribo U and polyribo A hybridize spontaneously.6 Ben Hall ...
Later it was found that the sugar in nucleic acid can be ribose or deoxyribose, giving two forms: RNA and DNA ... many proteins take the shape of an alpha helix, spiraled like a spring coil.
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