High Density Liquid Crystalline DNA

High Density Columnar Hexatic Liquid Crystalline DNA

A color transition from turquoise to blue in this DNA specimen suggests a very narrow thickness gradient proceeding from left to right. The DNA concentration for this specimen is approximately 450 milligrams per millimeter, and the magnification is approximately 300x. The digital image presented above was originally recorded on Fujichrome 64T transparency film using a Nikon Optiphot-Pol microscope with crossed polarized illumination. Exposures were recorded about 2.5 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.

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