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. 2013 Apr 2;18(4):3917–3926. doi: 10.3390/molecules18043917

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© 2013 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/).

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Chrome Azurol S (CAS) assay results. Absorption at 630 nm indicative of the concentration of CAS-ferric ion complex declines due to competition for ferric iron by other chelators. Each data point represents the means ± SD (n = 6).