Ball-and-stick model of PDB entry 4U92 which is a parallel G-quadruplex containing a water-mediated C-tetrad. This used a custom blender script to add pins and holes to allow printing each nucleotide separately. The structure is 4-fold symmetric so you need to print 4 of each nucleotide and a single set of the 3 bariums. Scale as desired. Prints nicely at 500%.