The wobble GoU pairs have been implicated in several
biological processes where RNA molecules play a key role.
We review the geometrical and conformational properties
of wobble GoU pairs on the basis of available crystal structures
of RNAs at high resolution. The similarities with the wobble
A+oC pairs and UoU pairs are illustrated, while
the differences with the recently discovered bifurcated
G[bull ]U pairs are contrasted.