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. 2014 Nov 13;5:613. doi: 10.3389/fmicb.2014.00613

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Copyright © 2014 Morrill, Brazelton, Kohl, Rietze, Miles, Kavanagh, Schrenk, Ziegler and Lang.

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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Average stable carbon isotope values of CO in the headspace of non-labeled CO utilization experiments of live and killed control treatments. The error bars are the standard deviation of the average value of the triplicate treatments. Significant isotopic enrichment of ¹³C in CO was only observed in the live experiments and not the killed controls.