Explain the amino–imino forms of cytosine and adenine ?

Biochemistry
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ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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Explain the amino–imino forms of cytosine and adenine ?

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Watson and Crick showed a mechanism for the spontaneous occurrence of transitions. Some of the hydrogen atoms on each of the four bases had the ability to change their location in order to produce a tautomer.

An amino group (-NH2) can tautomerize to form an imino form (═NH).

Keto–enol tautomerization is a another classical area of study in the branch of organic chemistry.

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