Figure 3
Minimal MR models for nucleic acid structures. The structure of the group II intron can be successfully solved (TFZ > 8 in Phaser and interpretable electron-density maps) using only the sugar-phosphate backbone distorted by up to 2 Å r.m.s.d. (a) or only the phosphate groups distorted by up to 1 Å r.m.s.d. (b) but not by using only the coordinates of the nucleobases (no Phaser solution was obtained) (c). |