Figure 3.

Relevant Asp residues interact by H bonds with SAM (pink color), SFG (dark blue color), 1a (green color), 2a (cyan color), 2b (purple color) and 4c (yellow color). The Mg²⁺ ion is shown as a green sphere and the RNA part is shown as a stick model (C atoms in white color). The PBD file for each one is provided as Supplementary Materials.