Click here to close Hello! We notice that you are using Internet Explorer, which is not supported by Echinobase and may cause the site to display incorrectly. We suggest using a current version of Chrome, FireFox, or Safari.
Science 2004 Nov 12;3065699:1161-4. doi: 10.1126/science.1102289.
Show Gene links Show Anatomy links

Sea urchin spine calcite forms via a transient amorphous calcium carbonate phase.

Politi Y , Arad T , Klein E , Weiner S , Addadi L .

The skeletons of adult echinoderms comprise large single crystals of calcite with smooth convoluted fenestrated morphologies, raising many questions about how they form. By using water etching, infrared spectroscopy, electron diffraction, and environmental scanning electron microscopy, we show that sea urchin spine regeneration proceeds via the initial deposition of amorphous calcium carbonate. Because most echinoderms produce the same type of skeletal material, they probably all use this same mechanism. Deposition of transient amorphous phases as a strategy for producing single crystals with complex morphology may have interesting implications for the development of sophisticated materials.

PubMed ID: 15539597
Article link: Science

Genes referenced: LOC100887844 LOC115925415