1905-2002
By Erwin chargaff
It states that in all DNA, Pyrimidines and Purines must have 1:1
Adenine : Thymine
Cytosine : Guanine
i.e., the amount of adenine = amount of thymine
similarly, the amount of cytosine = amount of guanine.
It indicated that DNA is symmetrical. (A)Double bond (T) and (C) triple bond (G)
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