Figure 3 - full size

 

Figure 3.
Fig. 3. (a) Stereo views of the 2 F[o] - F[c] electron-density map contoured at the 1 level. The RNA·DNA hybrid duplex with rC1·dG20 at the top of the helix. (b) The superposition of the I222 (purple) with the P2[1]2[1]2[1] (blue) structure.