Figure 5.
(a)–(d) Stereoviews of the best-fit superpositions of the stems of O3, SL-A, SL-B and stem-loop SL-C (including the UGCG tetraloop), respectively, from the ensemble of 20 refined NC:μΨ structures. Disordered loop nucleotides U182-G186 (SL-A), G206-A208 (SL-B) and the bulge residue U175 (SL-A) are also shown (b and c). (e),(f) Stereoviews of the best-fit superpositions of the main chain atoms of the N- and C-terminal zinc knuckle domains, respectively, from the ensemble of 20 refined NC: μΨ structures.