Fig 5. Stacking interface between HMfB dimers in the hypernucleosome.

Each dimer i forms stacking interactions with dimer i+2 and i+3, shown here for dimer 6. Residues deemed important are shown in ball-and-sticks and labeled; close stacking of G16 in dimer 6 and 9 is indicated by arrows (Cα shown as spheres); hydrogen-bonds are indicated with dashes. Image generated using PDB entry 5T5K [64]. HMfB; Histone B from Methanothermus fervidus; PDB, Protein Data Bank.