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. 2017 Jul 19;2(4):e00211-17. doi: 10.1128/mSphere.00211-17

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Copyright © 2017 Davies et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

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FIG 5 — Gallium isotopes at m/z 68.9256 and 70.9247 are present in biofilms exposed to 5 μg/ml gallium nitrate in positive-ion mode (A). F⁻ is present in biofilms exposed to ciprofloxacin (C₁₇H₁₈FN₃O₃) at 20 μg/ml in negative-ion mode (B). Spectra from samples exposed to the antimicrobials are red; spectra from control samples (biofilms not exposed to antimicrobials) are black.