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. 2015 May 5;6(3):e00519-15. doi: 10.1128/mBio.00519-15

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Copyright © 2015 Deka et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-ShareAlike 3.0 Unported license, which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original author and source are credited.

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FIG 3 — Characterization and identification of the covalently bound flavin. (A) The UV-visible absorbance spectra of Ftp_Tp-mediated flavinylated protein TP0171 and NqrC_Td as isolated from E. coli. The UV-visible absorbance spectra of free FAD and singly expressed Ftp_Tp, TP0171, and NqrC_Td are shown for comparison. Q-TOF mass spectra of flavinylated proteins obtained from NqrC_Td (B) and TP0171 (C). The mass differences correspond to covalently linked FMN.