The PDB ID given in the caption of Figure 3 is incorrect. The corrected caption can be seen below:
Figure 3. (A) Structure of compound 29 (orange) and SAM (pink) bound to SMYD3 (slate) (PDB ID: 6IJL). SMYD3 residues 3.5 Å away from 29 are shown in stick representation. (B) Overlay of structures of compounds 21 and 29 bound to SMYD3.