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. 2018 Apr 11;19(4):1165. doi: 10.3390/ijms19041165

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© 2018 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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Anti-tumor therapeutic effects of the B-2 lettuce. (a,b) Relative amount of viable cells assayed by Thiazolyl Blue Tetrazolium Bromide (MTT); (c,d) cell viability assayed by trypan blue staining. Human lung adenocarcinoma cell line A549, human hepatoma cell line Bel7402, human cancer colorectal adenoma cell line HepG2, and colon cancer cell line HT-29 were treated with the indicated concentrations of extracted fractions of B-2. The mean ± SD values of six separate experiments are shown.