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. 2021 Sep 10;2:27. doi: 10.1186/s43556-021-00041-4

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Comparative representation P-gp and EmrE. a ABCB1 (P-gp) transporter, one of the most frequently overexpressed transporters in human cancers. ABCB1 confers resistance to anthracyclines, vinca alkaloids, epipodophyllotoxins, camptothecins, methotrexate, mitoxantrone, etc. b EmrE transporter of Escherichia coli, belonging to SMR family of drug efflux transporters. EmrE confers resistance to dodecyl dimethyl ammonium chloride (DDAC) or Ethidium bromide