Answer
N-3 and N-7
Work Step by Step
These two positions in a purine ring of a purine nucleotide in DNA have the potential to form hydrogen bonds but are not involved in Watson-Crick base
pairing.
Lehninger Principles of Biochemistry 6th Edition
by Nelson, David L.; Cox, Michael M.
Published by
W.H. Freeman
ISBN 10:
1-42923-414-8
ISBN 13:
978-1-42923-414-6
Chapter 8 - Nucleotides and Nucleic Acids - Problems - Page 309: 1
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