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Guanine-based photonic crystals in fish scales form from an amorphous precursor
Dvir Gur1, Yael Politi, Berta Sivan
1Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel.
Angewandte Chemie (International Ed. in English)
|September 7, 2012
Abstract:
Starting from disorder: anhydrous guanine crystals compose the photonic arrays responsible for the skin and scale iridescence found in Japanese Koi fish. These guanine crystals were found to form in intracellular vesicles through an amorphous precursor phase. A combined cryo-SEM and synchrotron radiation X-ray diffraction study showed the evolution of the crystals in great detail.

