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. 2015 Sep 25;6:994. doi: 10.3389/fmicb.2015.00994

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Copyright © 2015 Ishii, Kawaichi, Nakagawa, Hashimoto and Nakamura.

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) or licensor 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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(A) Time courses of microbial current generation in the absence of Fe²⁺ ions under CO atmospheres. White and black bars indicate the period for light irradiation and dark conditions, respectively. An electrode potential was +0.4 V (vs. SHE). (B) Time courses of microbial current at an electrode potential of +0.4 V under air and CO atmospheres. (C) Diffuse transmission UV-vis spectrum of whole cells of A. ferrooxidans suspended in a DSMZ medium containing Na₂S₂O₄ as a reductant under CO atmospheres. (D) An action spectrum of the microbial current recovered by visible-light irradiation under a CO atmosphere. Initial OD₅₀₀ was 0.02.