Base Pair Geometry

Illustration of idealized base-pair parameters, d and λ, used respectively to displace and pivot complementary bases in the optimization of the standard reference frame for right-handed A- and B-DNA, with the origin at · and the x- and y-axes pointing in the designated directions. Th λ angles are the Glycosidic angles of the two bases.

Reference:

A Standard Reference Frame for the Description of Nucleic Acid Base-pair Geometry.