Figure 1.

Nucleosome pair potential system orientations and resulting energetic landscape. Orientations of the nucleosomes considered here are shown on the left. The axes represent each nucleosome’s coordinate system. The red axis is the nucleosome dyad vector, the blue is orthogonal to the face of the nucleosome, and the green is orthogonal to the other two. (A) The “stacked” nucleosome orientation. (B) The “side–side” nucleosome orientation. (C) The “rotated-stack” orientation. (D) The “rotated-side” orientation. (E) Free energy landscape, where the colors correspond to the orientation shown to the left. Error bars shown are approximately the same order as the thickness of the lines.