When cholesteric liquid crystalline DNA is oriented in a magnetic field, the regions containing low-density mesophases acquire a texture that resembles a repeating chevron structure, as illustrated in the photomicrograph presented above. The magnification is approximately 200x, and the image was recorded on Fujichrome 64T transparency film using a Nikon Optiphot-Pol microscope with crossed polarized illumination. Exposures were recorded about 3 f-steps under the recommended value given by an in-camera photomultiplier and were push-processed approximately 1.5 f-steps in the first E-6 developer.