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. 2017 Mar 9;8:104. doi: 10.3389/fphar.2017.00104

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Copyright © 2017 Sun, Guo, Zhang and Zhuang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Effect of free phenolic extract (FPE) of rape bee pollen on tyrosinase (TYR), TRP-1 and TRP-2 of B16 cells. Different letters were significantly different (p < 0.05) in same bar graph.