Alternating L/R cyclic peptide.
A potassium ion bound by 3PJZ backbone carbonyls
Nickel-Zinc-Iron-Sulphide center in 1OAO
Silver ions (exaggerated size) bound to ferritin (2X17)
Converting the net of a cube to the net of an octahedron.
Symmetries and paths in a grid
Isomorphism between colored graphs
PyMOL image of VALINK (valinomycin structure from CSD). Potassium ion is in purple.
Schematic of Valinomycin bound to a potassium ion. Dashed lines are interactions between C-O of an ester and the metal.