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(A) Contact map of the H4 tail. A contact is defined as a distance between nonhydrogen atoms of <0.35 nm. The residue contact occupancy is the highest atom contact occupancy within the two residues. In the contact map (B) the x axis represents the H4 tail residues, and the y axis represents the residues from the H2A-H2B fragment and DNA (location shown in A). (Framed in orange) The basic patch (H4 residues 16–20). To see this figure in color, go online.
