Crystallized photolyase

Top: An optical microscope image of crystallized photolyase, Bottom: An X-ray diffraction pattern from the photolyase crystals.

Top: An optical microscope image of crystallized photolyase enzymes before they are probed by the LCLS X-ray laser. Bottom: An X-ray diffraction pattern from the photolyase crystals. These patterns, made by X-rays interacting with atoms in the crystal, are used to determine the structure of the molecule. 

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