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. 2022 Apr 4;10:864977. doi: 10.3389/fbioe.2022.864977

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Copyright © 2022 Yun, Zhang, Li, Wang, Tu, Liu and Wang.

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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Native promoters characterization in S. erythraea NRRL 23338. (A) Relative normalized green fluorescence of different eGFP-expressing strains compared to the p _ermE*-harboring strain (fold-change). Error bars represented the standard deviation of three parallel samples. (B) Fluorescence microscope observation of wild-type strain S. erythraea NRRL 23338 and eGFP-expressing strains harboring promoters p _{SACE_2101}, p _ermE*, and p _rpsL(XC). Scale bar: 50 μm.