Stereo diagram of a ribbon representation of the holorepressor structure determined in the absence of operator, viewed along the molecular 2-fold axis.

The antisymmetric stretch gives rise to a dipole change along z, the molecular axis, and we deduce that this vibration is IR active, with symmetry species.

The orbital is not symmetric around the molecular axis and is therefore a pi orbital.

When a voltage is applied across the cell electrodes (1a) the molecular axis is realigned perpendicular to the face of the display.

The chirality induces a finite azimuthal twist from one layer to the next, producing a spiral twisting of the molecular axis along the layer normal.

The values z, θ, and d are the position of the molecule, the angle between the molecular axis and director, and the layer spacing.

When the vibration induces a dipole moment change pointing along the molecular axis the term parallel is applied, with the symbol .

When the vibration induces a dipole moment pointing perpendicular to the molecular axis the term perpendicular is applied, with the symbol .

Spanning the length of the molecule and coincident with the molecular sevenfold axis is a water-filled channel that ranges in diameter from 16 to 46 Å.

The molecular axis can tilt in the stack creating a helix pattern.