Guanine-based photonic crystals in fish scales form from an amorphous precursor.

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.

[1]  S. Weiner,et al.  Crystallization Pathways in Biomineralization , 2011 .

[2]  S. Weiner,et al.  Bone mineralization proceeds through intracellular calcium phosphate loaded vesicles: a cryo-electron microscopy study. , 2011, Journal of structural biology.

[3]  S. Weiner,et al.  Mapping amorphous calcium phosphate transformation into crystalline mineral from the cell to the bone in zebrafish fin rays , 2010, Proceedings of the National Academy of Sciences.

[4]  S. Weiner,et al.  Guanine‐Based Biogenic Photonic‐Crystal Arrays in Fish and Spiders , 2010 .

[5]  P. Fratzl,et al.  Microtexture and Chitin/Calcite Orientation Relationship in the Mineralized Exoskeleton of the American Lobster , 2008 .

[6]  S. Weiner,et al.  Amorphous calcium phosphate is a major component of the forming fin bones of zebrafish: Indications for an amorphous precursor phase , 2008, Proceedings of the National Academy of Sciences.

[7]  Shuichi Kinoshita,et al.  Physics of structural colors , 2008 .

[8]  Steve Weiner,et al.  Biogenic Guanine Crystals from the Skin of Fish May Be Designed to Enhance Light Reflectance , 2008 .

[9]  W. Clegg,et al.  Anhydrous guanine: a synchrotron study. , 2006, Acta crystallographica. Section C, Crystal structure communications.

[10]  Shuichi Kinoshita,et al.  Structural colors in nature: the role of regularity and irregularity in the structure. , 2005, Chemphyschem : a European journal of chemical physics and physical chemistry.

[11]  R. Davey,et al.  Crystal Polymorphism as a Probe for Molecular Self-Assembly during Nucleation from solutions: The Case of 2,6 - Dihydroxybenzoic Acid. , 2001 .

[12]  R. Wootton,et al.  Structural colour: Now you see it — now you don't , 2001, Nature.

[13]  Greg L. Hura,et al.  A high-quality x-ray scattering experiment on liquid water at ambient conditions , 2000 .

[14]  Andrew R. Parker,et al.  515 million years of structural colour , 2000 .

[15]  S. Weiner,et al.  Cellular control over spicule formation in sea urchin embryos: A structural approach. , 1999, Journal of structural biology.

[16]  Mckenzie,et al.  Multilayer reflectors in animals using green and gold beetles as contrasting examples , 1998, The Journal of experimental biology.

[17]  R. Docherty,et al.  Polymorphism in Molecular Crystals: Stabilization of a Metastable Form by Conformational Mimicry , 1997 .

[18]  P. Herring.  Reflective systems in aquatic animals , 1994 .

[19]  L. Addadi,et al.  Molecular Recognition at Crystal Interfaces , 1991, Science.

[20]  B. Brown.  THE FORM AND FUNCTION OF METAL‐CONTAINING ‘GRANULES’ IN INVERTEBRATE TISSUES , 1982 .

[21]  R. E. Marsh,et al.  The crystal structure of guanine monohydrate , 1971 .

[22]  M F Land,et al.  Mechanism of reflexion in silvery layers of fish and cephalopods , 1971, Proceedings of the Royal Society of London. Series B. Biological Sciences.

[23]  E. Denton,et al.  Review lecture: on the organization of reflecting surfaces in some marine animals. , 1970, Philosophical transactions of the Royal Society of London. Series B, Biological sciences.

[24]  A. Huxley,et al.  A Theoretical Treatment of the Reflexion of Light by Multilayer Structures , 1968 .

[25]  J. Nicol,et al.  Studies on reflexion of light from silvery surfaces of fishes, with special reference to the bleak, Alburnus alburnus , 1965, Journal of the Marine Biological Association of the United Kingdom.

[26]  W. G. Perdok,et al.  On the relations between structure and morphology of crystals. I , 1955 .

[27]  M F Land,et al.  The physics and biology of animal reflectors. , 1972, Progress in biophysics and molecular biology.

[28]  H. Lowenstam,et al.  Ultrastructure and development of iron mineralization in the radular teeth of Cryptochiton stelleri (Mollusca). , 1967, Journal of ultrastructure research.

[29]  D. L. Fox.  Animal biochromes and structural colours : physical, chemical, distributional & physiological features of coloured bodies in the animal world , 1953 .