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. 2011 Jun 1;12(6):3445–3458. doi: 10.3390/ijms12063445

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© 2011 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Schematic representation of the polymerization of Ca by a Sa-Sa site (here the synthesis of a tri-Ca): a synthesized tri-Ca is released by the Sa-Sa site.