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. 2019 Sep 10;24(18):3297. doi: 10.3390/molecules24183297

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© 2019 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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The comparative ratio of tyrosinase activity of the A. keiskei Leaf (AK. Leaf) at 500 μg/mL and roots (AK. Root) at 200, 500, 750 and 1000 μg/mL concentrations using kojic acid (10 and 20 μM) as the positive control.