
Survey of the (DCN, χ) distributions for two pseudoknot structures: (A) the 47-nt ΔU177 pseudoknot (Theimer et al. 2005) (PDB code: 1YMO) and (B) the 36-nt SRV-1 pseudoknot (Michiels et al. 2001) (PDB code: 1E95). DCN is the length of the C4–N1,9 virtual bond, and χ is the torsion angle between the P i –C4–P i +1 plane and the P i –C4–N1,9 plane.










