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. 2019 May 15;10:457. doi: 10.3389/fgene.2019.00457

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Copyright © 2019 Li, Wang, Fu, Zhang, Cao, Wang, Zhang, Li, Chen, Li, Li, Jiang, Sun, Tian, Li and Kang.

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) and the copyright owner(s) 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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Effects of treatment with different concentrations of tyrosine for 72 h on melanocytes. (A) Effects of different concentrations of tyrosine on melanocyte proliferation. (B) Effects of different concentrations of tyrosine on the tyrosinase content of melanocytes. Data are expressed as mean ± SD (n = 10). The small letters a, b, etc., on the top of each bar represents statistical significance. Data with different small letters on each bar are statistically significant (P < 0.05), while data with the same letters are not statistically significant (P > 0.05).