Figure 16.

Illustration of three orientations of polar uncharged side chain-phosphate group interactions for (a) ${\theta }_{ij}^{(1)}=0°$ (head-to-phosphate), (b) ${\theta }_{ij}^{(1)}=90°$ (side-to-phosphate), and (c) ${\theta }_{ij}^{(1)}=180°$ (tail-to-phosphate), respectively. The solid line represents the long axis of the polar uncharged side chain. The circle at one end of the solid line represents the dipole on the polar uncharged side chain (PSC). The black circle represents phosphate group (P).