A+T & G+C pairs have similar
structures
The combination of a two-ring
purine (A or
G) and a single-ring pyrimidine (T or C) forms a base pair (A+T or G+C ) with three
co-planar rings.
The A+T pair has two H-bonds versus the G+C pair with three .
All
text material © 2014 by Steven
M. Carr