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. 2014 Jan 27;7(2):673–726. doi: 10.3390/ma7020673

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© 2014 by the authors.

Licensee MDPI, 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/).

PMC Copyright notice

Figure 20. — Mechanism of the formation of hierarchical structures of CaCO₃–pepsin from amorpuus precursors. Reprinted with permission from [255]. Copyright 2012 Elsevier.