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Influence on the Formation of Aragonite or Vaterite by Otolith Macromolecules

✍ Scribed by Giuseppe Falini; Simona Fermani; Silvia Vanzo; Marin Miletic; Giulia Zaffino

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
260 KB
Volume
2005
Category
Article
ISSN
1434-1948

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✦ Synopsis

Abstract

Calcium carbonate polymorphism is one of the most challenging problems in biomineralization. Calcium carbonate exists in three crystalline forms: calcite, aragonite and vaterite. Otoliths of teleost fishes are made of vaterite and aragonite, located in different sacs and never mixed together. This paper presents a biochemical characterization of the intracrystalline macromolecules associated to the vateritic and aragonitic phases of otoliths. Experimental evidences from calcium carbonate overgrowth on the surface of otoliths and in vitro crystallization on the chitin‐silk fibroin assembly organic matrix suggest that the intracrystalline macromolecules associated to the otolith influence the aragoniteβˆ’vaterite polymorphism. (Β© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)

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